Comparison of relational database management systems
The following tables compare general and technical information for a number of relational database management systems. Please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.
General information
[edit]| Maintainer | First public release date | Latest stable version | Latest release date | License | Public issues list | |
|---|---|---|---|---|---|---|
| 4D (4th Dimension) | 4D S.A.S. | 1984 | v16.0 | 2017-01-10[1] | Proprietary | No |
| ADABAS | Software AG | 1970 | 8.1 | 2013-06 | Proprietary | No |
| Adaptive Server Enterprise | SAP AG | 1987 | 16.0 SP03 PL07 | 2019-06-10 | Proprietary | No |
| Advantage Database Server (ADS) | SAP AG | 1992 | 12.0 | 2015 | Proprietary | No |
| Altibase | Altibase Corp. | 2000 | 7.1.0.1.2 | 2018-03-02 | Proprietary | No |
| Apache Derby | Apache | 2004 | 10.17.1.0[2] | 2023-11-14 | Apache License | Yes[3] |
| ClustrixDB | MariaDB Corporation | 2010 | v7.0 | 2015-08-19 | Proprietary | No |
| CockroachDB | Cockroach Labs | 2015 | v24.1.0 | 2024-05-20 | BSL,CCL,MIT,BSD | Yes[4] |
| CUBRID | CUBRID | 2008-11 | 11.2.3 | 2023-01-31 | Apache License 2.0, BSD license for APIs and GUI tools | Yes[5] |
| Datacom | CA, Inc. | Early 70s[6] | 14[7] | 2012[8] | Proprietary | No |
| IBM Db2 | IBM | 1983 | 12.1[9]  | 2024-11-14; 5 months ago | Proprietary | No |
| Empress Embedded Database | Empress Software Inc | 1979 | 10.20 | 2010-03 | Proprietary | No |
| Exasol | EXASOL AG | 2004 | 7.1.1 | 2021-09-15; 3 years ago | Proprietary | No |
| FileMaker | FileMaker, Inc., an Apple subsidiary | 1985-04 | 19 | 2020-05-20 | Proprietary | No |
| Firebird | Firebird project | 2000-07-25 | 5.0.2[10] | 2025-02-12; 2 months ago | IPL[11] and IDPL[12] | Yes[13] |
| GPUdb | GIS Federal | 2014 | 3.2.5 | 2015-01-14 | Proprietary | No |
| HSQLDB | HSQL Development Group | 2001 | 2.6.1 | 2021-10-21 | BSD | Yes[14] |
| H2 | H2 Software | 2005 | 2.3.232 | 2024-08-12 | EPL and modified MPL | Yes[15] |
| Informix Dynamic Server | IBM / HCL Technologies | 1980 | 15.0.0.0 | 2024-11-20 | Proprietary | No |
| Ingres | Actian | 1974 | 11.2[16] | 2022-05-06 | GPL and Proprietary | No |
| InterBase | Embarcadero Technologies | 1984 | XE7 v12.0.4.357 | 2015-08-12 | Proprietary | No |
| Linter SQL RDBMS | RELEX Group | 1990 | 6.0.17.53 | 2018-02-15 | Proprietary | Yes[17] |
| LucidDB | The Eigenbase Project | 2007-01 | 0.9.4 | 2012-01-05 | GPL v2 | No |
| MariaDB | MariaDB Community | 2010-02-01 | 11.7.2[18] | 2025-02-13; 2 months ago | GPL v2, LGPL (for client-libraries)[19] | Yes[20] |
| MaxDB | SAP AG | 2003-05 | 7.9.0.8 | 2014 | Proprietary | Yes[21] |
| SingleStore (formerly MemSQL) | SingleStore | 2012-06 | 7.1.11 | 2020-10-12 | Proprietary | No |
| Microsoft Access (JET) | Microsoft | 1992 | 16 (2016) | 2015-09-22 | Proprietary | No |
| Microsoft Visual Foxpro | Microsoft | 1984 | 9 (2005) | 2007-10-11 | Proprietary | No |
| Microsoft SQL Server | Microsoft | 1989 | 2022[22] | 2022-11-16; 2 years ago | Proprietary | No |
| Microsoft SQL Server Compact (Embedded Database) | Microsoft | 2000 | 2011 (v4.0) | Proprietary | No | |
| Mimer SQL | Mimer Information Technology | 1978 | 11.0.8E | 2024-10-22 | Proprietary | No |
| MonetDB | MonetDB Foundation [23] | 2004 | Aug2024 [24] | 2024-08-26 | Mozilla Public License, version 2.0[25] | Yes[26] |
| mSQL | Hughes Technologies | 1994 | 4.1[27] | 2017-06-30 | Proprietary | No |
| MySQL | Oracle Corporation | 1995-11 | 8.0.38[28] | 2025-04-15; 7 days ago | GPL v2 or Proprietary | Yes[29] |
| NexusDB | NexusDB Pty Ltd | 2003 | 4.00.14 | 2015-06-25 | Proprietary | No |
| HPE NonStop SQL | Hewlett Packard Enterprise | 1987 | SQL/MX 3.4 | Proprietary | No | |
| NuoDB | NuoDB | 2013 | 4.1 | 2020-08 | Proprietary | No |
| Omnis Studio | TigerLogic Inc | 1982-07 | 6.1.3 Release 1no | 2015-12 | Proprietary | No |
| OpenEdge | Progress Software Corporation | 1984 | 12.8 | 2024-1 | Proprietary | No |
| OpenLink Virtuoso | OpenLink Software | 1998 | 7.2.5.1 | 2018-08-15 | GPL v2 or Proprietary | Yes[30] |
| Oracle DB | Oracle Corporation | 1979-11 | 23ai[31] | 2023-09-19; 19 months ago | Proprietary | No |
| Oracle Rdb | Oracle Corporation | 1984 | 7.4.1.1[32] | 2021-04-21[±] | Proprietary | No |
| Paradox | Corel Corporation | 1985 | 11 | 2009-09-07 | Proprietary | No |
| Percona Server for MySQL | Percona | 2006 | 8.0.37-29 | 2024-08-06[±] | GPL v2 | Yes |
| Actian Zen (PSQL) | Actian | 1982 | v15 | 2021 | Proprietary | No |
| Polyhedra DBMS | ENEA AB | 1993 | 9.0 | 2015-06-24 | Proprietary, with Polyhedra Lite available as Freeware[33] | No |
| PostgreSQL | PostgreSQL Global Development Group | 1989-06 | 17.4 | 2025-02-21[34] | Postgres License[35] | No[36] |
| R:Base | R:BASE Technologies | 1982 | 10.0 | 2016-05-26 | Proprietary | No |
| SAP HANA | SAP AG | 2010 | 2.0 SPS04 | 2019-08-08 | Proprietary | No |
| solidDB | UNICOM Global | 1992 | 7.0.0.10 | 2014-04-29 | Proprietary | No |
| SQL Anywhere | SAP AG | 1992 | 17.0.0.48 | 2019-07-26 | Proprietary | No |
| SQLBase | Unify Corp. | 1982 | 11.5 | 2008-11 | Proprietary | No |
| SQLite | D. Richard Hipp | 2000-09-12 | 3.49.1[37] | 2025-02-18; 2 months ago | Public domain | Yes[38] |
| SQream DB | SQream Technologies | 2014 | 2.1[39] | 2018-01-15 | Proprietary | No |
| Superbase | Superbase | 1984 | Classic | 2003 | Proprietary | No |
| Superbase NG | Superbase NG | 2002 | Superbase NG 2.10 | 2017 | Proprietary | Yes[40] |
| Teradata | Teradata | 1984 | 15 | 2014-04 | Proprietary | No |
| TiDB | PingCAP Inc. | 2016 | 8.5.1[41] | 2025-01-17; 3 months ago | Apache License | Yes[42] |
| UniData | Rocket Software | 1988 | 8.2.1 | 2017-07 | Proprietary | No |
| YugabyteDB | Yugabyte, Inc. | 2018 | 2.20.1.3[43] | 2024-01-25[±] | Apache License | Yes[44] |
| Maintainer | First public release date | Latest stable version | Latest release date | License | Public issues list |
Operating system support
[edit]The operating systems that the RDBMSes can run on.
| Windows | macOS | Linux | BSD | UNIX | AmigaOS | z/OS | OpenVMS | iOS | Android | |
|---|---|---|---|---|---|---|---|---|---|---|
| 4th Dimension | Yes | Yes | No | No | No | No | No | No | No | No |
| ADABAS | Yes | No | Yes | No | Yes | No | Yes | No | No | No |
| Adaptive Server Enterprise | Yes | No | Yes | Yes | Yes | No | No | No | No | No |
| Advantage Database Server | Yes | No | Yes | No | No | No | No | No | No | No |
| Altibase | Yes | No | Yes | No | Yes | No | No | No | No | No |
| Apache Derby | Yes | Yes | Yes | Yes | Yes | No | Yes | No | ? | No |
| ClustrixDB | No | No | Yes | No | Yes | No | No | No | No | No |
| CockroachDB | Yes | Yes | Yes | No | No | No | No | No | No | No |
| CUBRID | Yes | Partial | Yes | No | No | No | No | No | No | No |
| IBM Db2 | Yes | Yes | Yes | No | Yes | No | Yes | No | Yes | No |
| Empress Embedded Database | Yes | Yes | Yes | Yes | Yes | No | No | No | No | Yes |
| EXASolution | No | No | Yes | No | No | No | No | No | No | No |
| FileMaker | Yes | Yes | Yes | No | No | No | No | No | Yes | No |
| Firebird | Yes | Yes | Yes | Yes | Yes | No | Maybe | No | Yes[45] | Yes |
| HSQLDB | Yes | Yes | Yes | Yes | Yes | No | Yes | No | ? | ? |
| H2 | Yes | Yes | Yes | Yes | Yes | No | Yes | No | ? | Yes |
| Informix Dynamic Server | Yes | No | Yes | No | Yes (AIX) | No | No | No | No | No |
| Ingres | Yes | Yes | Yes | Yes | Yes | No | Partial | Yes[46] | No | No |
| InterBase | Yes | Yes | Yes | No | Yes (Solaris) | No | No | No | Yes | Yes |
| Linter SQL RDBMS | Yes | Yes | Yes | Yes | Yes | No | Under Linux on IBM Z | Yes | Yes | Yes |
| LucidDB | Yes | Yes | Yes | No | No | No | No | No | No | No |
| MariaDB | Yes | Yes[47] | Yes | Yes | Yes | No | No | No | ? | Yes[48] |
| MaxDB | Yes | No | Yes | No | Yes | No | Maybe | No | No | No |
| Microsoft Access (JET) | Yes | No | No | No | No | No | No | No | No | No |
| Microsoft Visual Foxpro | Yes | No | No | No | No | No | No | No | No | No |
| Microsoft SQL Server | Yes | No | Yes[49] | No | No | No | No | No | No | No |
| Microsoft SQL Server Compact (Embedded Database) | Yes | No | No | No | No | No | No | No | No | No |
| Mimer SQL | Yes | Yes | Yes | No | Yes | No | No | Yes[50] | No | Yes |
| MonetDB | Yes | Yes | Yes | Yes | Yes | No | No | No | No | No |
| MySQL | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | ? | Yes[51] |
| Omnis Studio | Yes | Yes | Yes | No | No | No | No | No | No | No |
| OpenEdge | Yes | No | Yes | No | Yes | No | No | No | No | No |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes | Yes | No | No | No | No | No |
| Oracle | Yes | Yes | Yes | No | Yes | No | Yes | Yes | No | No |
| Oracle Rdb | No | No | No | No | No | No | No | Yes | No | No |
| Actian Zen (PSQL) | Yes | Yes (OEM only) | Yes | No | No | No | No | No | Yes | Yes |
| Polyhedra | Yes | No | Yes | No | Yes | No | No | No | No | No |
| PostgreSQL | Yes | Yes | Yes | Yes | Yes | Yes (MorphOS)[52] | Under Linux on IBM Z[53] | No | No | Yes |
| R:Base | Yes | No | No | No | No | No | No | No | No | No |
| SAP HANA | Yes | No | Yes | No | No | No | No | No | No | No |
| solidDB | Yes | No | Yes | No | Yes | No | Under Linux on IBM Z | No | No | No |
| SQL Anywhere | Yes | Yes | Yes | No | Yes | No | No | No | No | Yes |
| SQLBase | Yes | No | Yes | No | No | No | No | No | No | No |
| SQLite | Yes | Yes | Yes | Yes | Yes | Yes | Maybe | No | Yes | Yes |
| SQream DB | No | No | Yes | No | No | No | No | No | No | No |
| Superbase | Yes | No | No | No | No | Yes | No | No | No | No |
| Superbase NG | Yes | No | Yes | No | No | No | No | No | No | No |
| Teradata | Yes | No | Yes | No | Yes | No | No | No | No | No |
| TiDB | Yes | Yes | Yes | Partial | No | No | No | No | No | No |
| UniData | Yes | No | Yes | No | Yes | No | No | No | No | No |
| UniVerse | Yes | No | Yes | No | Yes | No | No | No | No | No |
| YugabyteDB | Yes | Yes | Yes | No | No | No | No | No | No | No |
| Windows | macOS | Linux | BSD | UNIX | AmigaOS | z/OS | OpenVMS | iOS | Android |
Fundamental features
[edit]Information about what fundamental RDBMS features are implemented natively.
| Database Name | ACID | Referential integrity | Transactions | Fine-grained locking | Multiversion concurrency control | Unicode | Interface | Type inference |
|---|---|---|---|---|---|---|---|---|
| 4th Dimension | Yes | Yes | Yes | ? | ? | Yes | GUI & SQL | Yes |
| ADABAS | Yes | No | Yes | ? | ? | Yes | proprietary direct call & SQL (via 3rd party) | Yes |
| Adaptive Server Enterprise | Yes | Yes | Yes | Yes (Row-level locking) | Yes | Yes | API & GUI & SQL | Yes |
| Advantage Database Server | Yes | Yes | Yes | Yes (Row-level locking) | ? | Yes4 | API & SQL | Yes |
| Altibase | Yes | Yes | Yes | Yes (Row-level locking) | ? | Yes | API & GUI & SQL | Yes |
| Apache Derby | Yes | Yes | Yes | Yes (Row-level locking) [54] | ? | Yes | SQL | Yes |
| ClustrixDB | Yes | Yes | Yes | Yes | Yes | Yes | SQL | Yes |
| CockroachDB | Yes | Yes | Yes | Yes (Row-level locking) | Yes | Yes | SQL | No |
| CUBRID | Yes | Yes | Yes | Yes (Row-level locking) | Yes | Yes | GUI & SQL | Yes |
| IBM Db2 | Yes | Yes | Yes | Yes (Row-level locking)[55] | ? | Yes | GUI & SQL | Yes |
| Empress Embedded Database | Yes | Yes | Yes | ? | ? | Yes | API & SQL | Yes |
| EXASolution | Yes | Yes | Yes | ? | ? | Yes | API & GUI & SQL | Yes |
| Firebird | Yes | Yes | Yes | ? | Yes | Yes | API & SQL | Yes |
| HSQLDB | Yes | Yes | Yes | ? | Yes | Yes | SQL | Yes |
| H2 | Yes | Yes | Yes | ? | Yes[56] | Yes | SQL | Yes |
| Informix Dynamic Server | Yes | Yes | Yes | Yes (Row-level locking) | Yes | Yes | SQL, REST, MQ, and JSON | Yes |
| Ingres | Yes | Yes | Yes | Yes (Row-level locking) | Yes | Yes | SQL & QUEL | Yes |
| InterBase | Yes | Yes | Yes | ? | ? | Yes | SQL | Yes |
| Linter SQL RDBMS | Yes | Yes | Yes (Except for DDL) | Yes (Row-level locking) | ? | Yes | API & GUI & SQL | Yes |
| LucidDB | Yes | No | No | ? | ? | Yes | SQL | Yes |
| MariaDB | Yes2 | Yes | Yes2 except for DDL[57][58] | Yes (Row-level locking) | Yes | Yes | SQL | Yes |
| MaxDB | Yes | Yes | Yes | ? | ? | Yes | SQL | Yes |
| Microsoft Access (JET) | Yes | Yes | Yes | ? | ? | Yes | GUI & SQL | Yes |
| Microsoft Visual FoxPro | Yes | Yes | Yes | Yes (Row-level locking SMB2) | Yes | No | GUI & SQL | Yes |
| Microsoft SQL Server | Yes | Yes | Yes | Yes (Row-level locking)[59] | Yes | Yes | GUI & SQL | Yes |
| Microsoft SQL Server Compact (Embedded Database) | Yes | Yes | Yes | ? | ? | Yes | GUI & SQL | Yes |
| Mimer SQL | Yes | Yes | Yes | Yes (Optimistic locking) | Yes | Yes | API & GUI & SQL | Yes |
| MonetDB | Yes | Yes | Yes | ? | ? | Yes | API & SQL & MAL | Yes |
| MySQL | Yes2 | Yes3 | Yes2 except for DDL[57] | Yes (Row-level locking)[60] | Yes | Yes | GUI5 & SQL | Yes |
| OpenEdge | Yes | Yes6 | Yes | Yes (Row-level locking) | ? | Yes | GUI & SQL | Yes |
| OpenLink Virtuoso | Yes | Yes | Yes | ? | ? | Yes | API & GUI & SQL | Yes |
| Oracle | Yes | Yes | Yes except for DDL[57] | Yes (Row-level locking)[61] | Yes | Yes | API & GUI & SQL | Yes |
| Oracle Rdb | Yes | Yes | Yes | ? | ? | Yes | SQL | Yes |
| Actian Zen (PSQL) | Yes | Yes | Yes | ? | ? | Yes | API & GUI & SQL | Yes |
| Polyhedra DBMS | Yes | Yes | Yes | Yes (optimistic and pessimistic cell-level locking)[62] | ? | Yes | API & SQL | Yes |
| PostgreSQL | Yes | Yes | Yes | Yes (Row-level locking)[63] | Yes | Yes | API & GUI & SQL | No[64] |
| SAP HANA | Yes | Yes | Yes | Yes (Row-level locking) | Yes | Yes | API & GUI & SQL | Yes |
| solidDB | Yes | Yes | Yes | Yes (Row-level locking) | ? | Yes | API & SQL | Yes |
| SQL Anywhere | Yes | Yes | Yes | Yes (Row-level locking)[65] | Yes[66] | Yes | API & GUI & HTTP(S) (REST & SOAP)[67] & SQL | Yes |
| SQLBase | Yes | Yes | Yes | ? | ? | Yes | API & GUI & SQL | Yes |
| SQLite | Yes | Yes | Yes | No (Database-level locking)[68] | No | Optional[69] | API & SQL | Yes |
| Superbase NG | ? | ? | ? | Yes (Record-level locking) | ? | Yes | GUI & Proprietary & ODBC | Yes |
| Teradata | Yes | Yes | Yes | Yes (Hash and Partition) | ? | Yes | SQL | Yes |
| TiDB | Yes | Yes | Yes except for DDL[57] | Yes (Row-level locking)[70] | Yes | Yes | GUI5 & SQL | Yes |
| UniData | Yes | No | Yes | ? | ? | Yes | Multiple | Yes |
| UniVerse | Yes | No | Yes | ? | ? | Yes | Multiple | Yes |
| Database Name | ACID | Referential integrity | Transactions | Fine-grained locking | Multiversion concurrency control | Unicode | Interface | Type inference |
- Note (1): Currently only supports read uncommitted transaction isolation. Version 1.9 adds serializable isolation and version 2.0 will be fully ACID compliant.
- Note (2): MariaDB and MySQL provide ACID compliance through the default InnoDB storage engine.[71][72]
- Note (3): "For other than InnoDB storage engines, MySQL Server parses and ignores the FOREIGN KEY and REFERENCES syntax in CREATE TABLE statements. The CHECK clause is parsed but ignored by all storage engines."[73]
- Note (4): Support for Unicode is new in version 10.0.
- Note (5): MySQL provides GUI interface through MySQL Workbench.
- Note (6): OpenEdge SQL database engine uses Referential Integrity, OpenEdge ABL Database engine does not and is handled via database triggers.
Limits
[edit]Information about data size limits.
| Max DB size | Max table size | Max row size | Max columns per row | Max Blob/Clob size | Max CHAR size | Max NUMBER size | Min DATE value | Max DATE value | Max column name size | |
|---|---|---|---|---|---|---|---|---|---|---|
| 4th Dimension | Limited | ? | ? | 65,135 | 200 GB (2 GiBUnicode) | 200 GB (2 GiBUnicode) | 64 bits | ? | ? | ? |
| Advantage Database Server | Unlimited | 16 EiB | 65,530 B | 65,135 / (10+ AvgFieldNameLength) | 4 GiB | ? | 64 bits | ? | ? | 128 |
| Apache Derby | Unlimited | Unlimited | Unlimited | 1,012 (5,000 in views) | 2,147,483,647 chars | 254 (VARCHAR: 32,672) | 64 bits | 0001-01-01 | 9999-12-31 | 128 |
| ClustrixDB | Unlimited | Unlimited | 64 MB on Appliance, 4 MB on AWS | ? | 64 MB | 64 MB | 64 MB | 0001-01-01 | 9999-12-31 | 254 |
| CUBRID | 2 EB | 2 EB | Unlimited | Unlimited | Unlimited | 1 GB | 64 bits | 0001-01-01 | 9999-12-31 | 254 |
| IBM DB2 | Unlimited | 2 ZB | 1,048,319 B | 1,012 | 2 GB | 32 KiB | 64 bits | 0001-01-01 | 9999-12-31 | 128 |
| Empress Embedded Database | Unlimited | 263−1 bytes | 2 GB | 32,767 | 2 GB | 2 GB | 64 bits | 0000-01-01 | 9999-12-31 | 32 |
| EXASolution | Unlimited | Unlimited | Unlimited | 10,000 | — | 2 MB | 128 bits | 0001-01-01 | 9999-12-31 | 256 |
| FileMaker | 8 TB | 8 TB | 8 TB | 256,000,000 | 4 GB | 10,000,000 | 1 billion characters, 10−400 to 10400, ± | 0001-01-01 | 4000-12-31 | 100 |
| Firebird | Unlimited1 | ≈32 TB | 65,536 B | Depends on data types used | 32 GB | 32,767 B | 128 bits | 100 | 32768 | 63 |
| HSQLDB | 64 TB | Unlimited8 | Unlimited8 | Unlimited8 | 64 TB7 | Unlimited8 | Unlimited8 | 0001-01-01 | 9999-12-31 | 128 |
| H2 | 64 TB | Unlimited8 | Unlimited8 | Unlimited8 | 64 TB7 | Unlimited8 | 64 bits | -99999999 | 99999999 | Unlimited8 |
| Max DB size | Max table size | Max row size | Max columns per row | Max Blob/Clob size | Max CHAR size | Max NUMBER size | Min DATE value | Max DATE value | Max column name size | |
| Informix Dynamic Server | ≈0.5 YB12 | ≈0,5YB12 | 32,765 bytes (exclusive of large objects) | 32,765 | 4 TB | 32,76514 | 1012513 | 01/01/000110 | 12/31/9999 | 128 bytes |
| Ingres | Unlimited | Unlimited | 256 KB | 1,024 | 2 GB | 32 000 B | 64 bits | 0001 | 9999 | 256 |
| InterBase | Unlimited1 | ≈32 TB | 65,536 B | Depends on data types used | 2 GB | 32,767 B | 64 bits | 100 | 32768 | 31 |
| Linter SQL RDBMS | Unlimited | 230 rows | 64 KB (w/o BLOBs), 2GB (each BLOB value) | 250 | 2 GB | 4000 B | 64 bits | 0001-01-01 | 9999-12-31 | 66 |
| MariaDB | Unlimited | MyISAM storage limits: 256 TB; Innodb storage limits: 64 TB; Aria storage limits: ??? | 64 KB3 | 4,0964 | 4 GB (longtext, longblob) | 64 KB (text) | 64 bits | 1000 | 9999 | 64[74] |
| Microsoft Access (JET) | 2 GB | 2 GB | 16 MB | 255 | 64 KB (memo field), 1 GB ("OLE Object" field) | 255 B (text field) | 32 bits | 0100 | 9999 | 64 |
| Microsoft Visual Foxpro | Unlimited | 2 GB | 65,500 B | 255 | 2 GB | 16 MB | 32 bits | 0001 | 9999 | 10 |
| Microsoft SQL Server | 524,272 TB (32 767 files × 16 TB max file size) 16ZB per instance | 524,272 TB | 8,060 bytes / 2 TB6 | 1,024 / 30,000(with sparse columns) | 2 GB / Unlimited (using RBS/FILESTREAM object) | 2 GB6 | 126 bits2 | 0001 | 9999 | 128 |
| Microsoft SQL Server Compact (Embedded Database) | 4 GB | 4 GB | 8,060 bytes | 1024 | 2 GB | 4000 | 154 bits | 0001 | 9999 | 128 |
| Mimer SQL | Unlimited | Unlimited | 16000 (+lob data) | 252 | Unlimited | 15000 | 45 digits | 0001-01-01 | 9999-12-31 | 128 |
| MonetDB | Unlimited | Unlimited | Unlimited | Unlimited | 2 GB | 2 GB | 128 bits | -4712-01-01 | 9999-12-31 | 1024 |
| MySQL | Unlimited | MyISAM storage limits: 256 TB; Innodb storage limits: 64 TB | 64 KB3 | 4,0964 | 4 GB (longtext, longblob) | 64 KB (text) | 64 bits | 1000 | 9999 | 64 |
| OpenLink Virtuoso | 32 TB per instance (Unlimited via elastic cluster) | DB size (or 32 TB) | 4 KB | 200 | 2 GB | 2 GB | 231 | 0 | 9999 | 100 |
| Oracle | 2 PB (with standard 8k block) 8 PB (with max 32k block) 8 EB (with max 32k block and BIGFILE option) | 4 GB × block size (with BIGFILE tablespace) | 8 KB | 1,000 | 128 TB | 32,767 B11 | 126 bits | −4712 | 9999 | 128 |
| Max DB size | Max table size | Max row size | Max columns per row | Max Blob/Clob size | Max CHAR size | Max NUMBER size | Min DATE value | Max DATE value | Max column name size | |
| Actian Zen (PSQL) | 4 billion objects | 256 GB | 2 GB | 1,536 | 2 GB | 8,000 bytes | 64 bits | 01-01-0001 | 12-31-9999 | 128 bytes |
| Polyhedra | Limited by available RAM, address space | 232 rows | Unlimited | 65,536 | 4 GB (subject to RAM) | 4 GB (subject to RAM) | 64 bits | 0001-01-01 | 8000-12-31 | 255 |
| PostgreSQL[75] | Unlimited | 32 TB | 1.6 TB | 250–1600 depending on type | 1 GB (text, bytea) stored inline or 4 TB using pg_largeobject | 1 GB | Unlimited | −4,713 | 5,874,897 | 63 |
| SAP HANA | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
| solidDB | 256 TB | 256 TB | 32 KB + BLOB data | Limited by row size | 4 GB | 4 GB | 64 bits | -32768-01-01 | 32767-12-31 | 254 |
| SQL Anywhere[78] | 104 TB (13 files, each file up to 8 TB (32 KB pages)) | Limited by file size | Limited by file size | 45,000 | 2 GB | 2 GB | 64 bits | 0001-01-01 | 9999-12-31 | 128 bytes |
| SQLite | 128 TB (231 pages × 64 KB max page size) | Limited by file size | Limited by file size | 32,767 | 2 GB | 2 GB | 64 bits | No DATE type9 | No DATE type9 | Unlimited |
| Teradata | Unlimited | Unlimited | 64000 wo/lobs (64 GB w/lobs) | 2,048 | 2 GB | 64,000 | 38 digits | 0001-01-01 | 9999-12-31 | 128 |
| UniVerse | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited |
| Max DB size | Max table size | Max row size | Max columns per row | Max Blob/Clob size | Max CHAR size | Max NUMBER size | Min DATE value | Max DATE value | Max column name size |
- Note (1): Firebird 2.x maximum database size is effectively unlimited with the largest known database size >980 GB.[79] Firebird 1.5.x maximum database size: 32 TB.
- Note (2): Limit is 1038 using
DECIMALdatatype.[80] - Note (3): InnoDB is limited to 8,000 bytes (excluding
VARBINARY,VARCHAR,BLOB, orTEXTcolumns).[81] - Note (4): InnoDB is limited to 1,017 columns.[81]
- Note (6): Using
VARCHAR (MAX)in SQL 2005 and later.[82] - Note (7): When using a page size of 32 KB, and when BLOB/CLOB data is stored in the database file.
- Note (8): Java array size limit of 2,147,483,648 (231) objects per array applies. This limit applies to number of characters in names, rows per table, columns per table, and characters per
CHAR/VARCHAR. - Note (9): Despite the lack of a date datatype, SQLite does include date and time functions,[83] which work for timestamps between 24 November 4714 B.C. and 1 November 5352.
- Note (10): Informix DATETIME type has adjustable range from YEAR only through 1/10000th second. DATETIME date range is 0001-01-01 00:00:00.00000 through 9999-12-31 23:59:59.99999.
- Note (11): Since version 12c. Earlier versions support up to 4000 B.
- Note (12): The 0.5 YB limit refers to the storage limit of a single Informix server instance beginning with v15.0. Informix v12.10 and later versions support using sharding techniques to distribute a table across multiple server instances. A distributed Informix database has no upper limit on table or database size.
- Note (13): Informix DECIMAL type supports up to 32 decimal digits of precision with a range of 10−130 to 10125. Fixed and variable precision are supported.
- Note (14): The LONGLVARCHAR type supports strings up to 4TB.
Tables and views
[edit]Information about what tables and views (other than basic ones) are supported natively.
- Note (1): Server provides tempdb, which can be used for public and private (for the session) temp tables.[84]
- Note (2): Materialized views are not supported in Informix; the term is used in IBM's documentation to refer to a temporary table created to run the view's query when it is too complex, but one cannot for example define the way it is refreshed or build an index on it. The term is defined in the Informix Performance Guide.[85]
- Note (4): Materialized views can be emulated using stored procedures and triggers.[86]
Indexes
[edit]Information about what indexes (other than basic B-/B+ tree indexes) are supported natively.
| R-/R+ tree | Hash | Expression | Partial | Reverse | Bitmap | GiST | GIN | Full-text | Spatial | Forest of Trees Index | Duplicate index prevention | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4th Dimension | ? | Cluster | ? | ? | ? | ? | ? | ? | Yes | ? | ? | No |
| ADABAS | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | No |
| Adaptive Server Enterprise | No | No | Yes | No | Yes | No | No | No | Yes | ? | ? | No |
| Advantage Database Server | No | No | Yes | No | Yes | Yes | No | No | Yes | ? | ? | No |
| Apache Derby | No | No | No | No | No | No | No | No | No[87] | ? | ? | No |
| ClustrixDB | No | Yes | No | No | No | No | No | No | No | No | ? | No |
| CUBRID | No | No | Yes[88] | Yes[88] | Yes | No | No | No | No | No | No | No |
| IBM Db2 | Yes | Yes | Yes | No | Yes | Yes | No | No | Yes[89] | ? | ? | No |
| Empress Embedded Database | Yes | No | No | Yes | No | Yes | No | No | No | ? | ? | No |
| EXASolution | No | Yes | No | No | No | No | No | No | No | ? | ? | No |
| Firebird | No | No | Yes | Yes | Yes | No | No | No | No[90] | ? | ? | No |
| HSQLDB | No | No | No | No | No | No | No | No | No | ? | ? | No |
| H2 | No | Yes | No | No | No | No | No | No | Yes[91] | Yes[92] | ? | No |
| Informix Dynamic Server | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes[93] | Yes |
| Ingres | Yes | Yes | Ingres v10 | No | No | Ingres v10 | No | No | No | ? | ? | No |
| InterBase | No | No | No | No | No | No | No | No | No | ? | ? | No |
| Linter SQL RDBMS10 | No | Yes temporary indexes for equality joins | Yes for some scalar functions like LOWER and UPPER | No | No | No | No | No | Yes[94] | No | No | Yes |
| LucidDB | No | No | No | No | No | Yes | No | No | No | ? | ? | No |
| MariaDB | Aria and MyISAM tables and, since v10.2.2, InnoDB tables only[95] | MEMORY,[96] InnoDB,5 tables only | PERSISTENT virtual columns only[97] | No | No | No | No | No | Yes[98] | Aria and MyISAM tables and, since v10.2.2, InnoDB tables only[95] | ? | No |
| MaxDB | No | No | No | No | No | No | No | No | No | ? | ? | No |
| Microsoft Access (JET) | No | No | No | No | No | No | No | No | No[99] | ? | ? | No |
| Microsoft Visual Foxpro | No | No | Yes | Yes | Yes2 | Yes | No | No | No | ? | ? | No |
| Microsoft SQL Server | Spatial Indexes | Yes4 | Yes3 | Yes | on Computed columns3 | Bitmap filter index for Star Join Query | No | No | Yes[100] | Yes[101] | ? | No |
| Microsoft SQL Server Compact (Embedded Database) | No | No | No | No | No | No | No | No | No[102] | ? | ? | No |
| Mimer SQL | No | No | No | No | Yes | No | No | No | Yes | Yes | No | No |
| MonetDB | No | Yes | No | No | No | No | No | No | No | No | No | No |
| MySQL | Spatial Indexes[103] | MEMORY, Cluster (NDB), InnoDB,5 tables only | No[104] | No | No | No | No | No | MyISAM tables[105] and, since v5.6.4, InnoDB tables[106] | MyISAM tables[107] and, since v5.7.5, InnoDB tables[108] | ? | No |
| OpenLink Virtuoso | Yes | Cluster | Yes | Yes | No | Yes | No | No | Yes | Yes (Commercial only) | No | No |
| Oracle | Yes 11 | Cluster Tables | Yes | Yes 6 | Yes | Yes | No | No | Yes[109] | Yes[110] | ? | Yes[111] |
| Oracle Rdb | No | Yes | ? | No | No | ? | No | No | ? | ? | ? | No |
| Actian Zen (PSQL) | No | No | No | No | No | No | No | No | No | No | No | No |
| Polyhedra DBMS | No | Yes | No | No | No | No | No | No | No | No | ? | No |
| PostgreSQL | Yes | Yes | Yes | Yes | Yes7 | Yes | Yes[112] | Yes | Yes[113] | PostGIS[114] | No | No |
| SAP HANA | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | No |
| solidDB | No | No | No | No | Yes | No | No | No | No | No | No | No |
| SQL Anywhere | No | No | Yes | No | No | No | No | No | Yes | Yes | ? | Yes |
| SQLite | Yes[115] | No | Yes[116] | Yes | No | No | No | No | Yes[117] | SpatiaLite[118] | ? | No |
| SQream DB | ? | ? | ? | ? | Yes | ? | ? | ? | ? | ? | ? | No |
| Teradata | No | Yes | Yes | Yes | No | Yes | No | No | ?[119] | ? | ? | No |
| UniVerse | Yes | Yes | Yes3 | Yes3 | Yes3 | No | No | No | ? | Yes[120] | ? | No |
| R-/R+ tree | Hash | Expression | Partial | Reverse | Bitmap | GiST | GIN | Full-text | Spatial | Forest of Trees Index | Duplicate index prevention |
- Note (1): The users need to use a function from freeAdhocUDF library or similar.[121]
- Note (2): Can be implemented for most data types using expression-based indexes.
- Note (3): Can be emulated by indexing a computed column[122] (doesn't easily update) or by using an "Indexed View"[123] (proper name not just any view works[124]).
- Note (4): Used for InMemory ColumnStore index, temporary hash index for hash join, Non/Cluster & fill factor.
- Note (5): InnoDB automatically generates adaptive hash index[125] entries as needed.
- Note (6): Can be implemented using Function-based Indexes in Oracle 8i and higher, but the function needs to be used in the sql for the index to be used.
- Note (7): A PostgreSQL functional index can be used to reverse the order of a field.
- Note (10): B+ tree and full-text only for now.
- Note (11): R-Tree indexing available in base edition with Locator but some functionality requires Personal Edition or Enterprise Edition with Spatial option.
- Note (12): FOT or Forest of Trees indexes is a type of B-tree index consisting of multiple B-trees which reduces contention in multi-user environments.[126]
Database capabilities
[edit]| Union | Intersect | Except | Inner joins | Outer joins | Inner selects | Merge joins | Blobs and clobs | Common table expressions | Windowing functions | Parallel query | System-versioned tables | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4th Dimension | Yes | Yes | Yes | Yes | Yes | No | No | Yes | ? | ? | ? | ? |
| ADABAS | Yes | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
| Adaptive Server Enterprise | Yes | ? | ? | Yes | Yes | Yes | Yes | Yes | ? | ? | Yes | ? |
| Advantage Database Server | Yes | No | No | Yes | Yes | Yes | Yes | Yes | ? | No | ? | ? |
| Altibase | Yes | Yes | Yes, via MINUS | Yes | Yes | Yes | Yes | Yes | No | No | No | ? |
| Apache Derby | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | No | No | ? | ? |
| ClustrixDB | Yes | No | No | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | ? |
| CUBRID | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes[88] | ? | ? |
| IBM Db2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes[127] | Yes[128] |
| Empress Embedded Database | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | ? | ? | ? |
| EXASolution | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | ? |
| Firebird | Yes | No | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | ? |
| HSQLDB | Yes | Yes | Yes | Yes | Yes | Yes | Yes[129] | Yes | Yes | No | Yes[129] | ? |
| H2 | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | experimental[130] | Yes[131] | ? | ? |
| Informix Dynamic Server | Yes | Yes | Yes, via MINUS | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes[132] | ? |
| Ingres | Yes | No | No | Yes | Yes | Yes | Yes | Yes | Yes[133] | Yes[134] | Yes[135] | ? |
| InterBase | Yes | ? | ? | Yes | Yes | ? | ? | Yes | ? | ? | ? | ? |
| Linter SQL RDBMS | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | No |
| LucidDB | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | ? | ? | ? | ? |
| MariaDB | Yes | 10.3+[136] | 10.3+[137] | Yes | Yes | Yes | No | Yes | Yes[138] | Yes[139] | No[140] | Yes[128] |
| MaxDB | Yes | ? | ? | Yes | Yes | Yes | No | Yes | ? | ? | ? | ? |
| Microsoft Access (JET) | Yes | No | No | Yes | Yes | Yes | No | Yes | No | No | ? | ? |
| Microsoft Visual Foxpro | Yes | ? | ? | Yes | Yes | Yes | ? | Yes | ? | ? | ? | ? |
| Microsoft SQL Server | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes[141] | Yes[142] | Yes[128] |
| Microsoft SQL Server Compact (Embedded Database) | Yes | No | No | Yes | Yes | ? | No | Yes | No | No | ? | ? |
| Mimer SQL | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | No | No | ? |
| MonetDB | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No |
| MySQL | Yes | 8+[143] | 8+[144] | Yes | Yes | Yes | No | Yes | 8+[145] | 8+[146] | No[140] | No[128] |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | ? | ? | Yes | ? |
| Oracle | Yes | Yes | Yes, via MINUS | Yes | Yes | Yes | Yes | Yes | Yes 1 | Yes | Yes[147] | Yes[148] |
| Oracle Rdb | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | ? | ? | ? |
| Actian Zen (PSQL) | Yes | No | No | Yes | Yes | ? | ? | Yes | No | No | No | ? |
| Polyhedra DBMS | Yes | Yes | Yes | Yes | Yes | No | No | Yes | No | No | No | ? |
| PostgreSQL | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes[149] | No[128] |
| SAP HANA | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
| solidDB | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | No | ? |
| SQL Anywhere | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? |
| SQLite | Yes | Yes | Yes | Yes | 3.43.0+[150] | Yes | No | Yes | 3.8.3+[151] | 3.25+[152] | No | No[128] |
| SQream DB | ALL only | No | No | Yes | Yes | Yes | Yes | No | Yes | Yes | No | ? |
| Teradata | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? |
| UniVerse | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | No | No | ? | ? |
| Union | Intersect | Except | Inner joins | Outer joins | Inner selects | Merge joins | Blobs and clobs | Common table expressions | Windowing functions | Parallel query | System-versioned tables |
- Note (1): Recursive CTEs introduced in 11gR2 supersedes similar construct called CONNECT BY.
Data types
[edit]| Type system | Integer | Floating point | Decimal | String | Binary | Date/Time | Boolean | Other | |
|---|---|---|---|---|---|---|---|---|---|
| 4th Dimension | Static | UUID (16-bit), SMALLINT (16-bit), INT (32-bit), BIGINT (64-bit), NUMERIC (64-bit) | REAL, FLOAT | REAL, FLOAT | CLOB, TEXT, VARCHAR | BIT, BITVARYING, BLOB | DURATION, INTERVAL, TIMESTAMP | BOOLEAN | PICTURE |
| Altibase[153] | Static | SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | REAL (32-bit), DOUBLE (64-bit) | DECIMAL, NUMERIC, NUMBER, FLOAT | CHAR, VARCHAR, NCHAR, NVARCHAR, CLOB | BLOB, BYTE, NIBBLE, BIT, VARBIT | DATE | GEOMETRY | |
| ClustrixDB[154] | Static | TINYINT (8-bit), SMALLINT (16-bit), MEDIUMINT (24-bit), INT (32-bit), BIGINT (64-bit) | FLOAT (32-bit), DOUBLE | DECIMAL | CHAR, BINARY, VARCHAR, VARBINARY, TEXT, TINYTEXT, MEDIUMTEXT, LONGTEXT | TINYBLOB, BLOB, MEDIUMBLOB, LONGBLOB | DATETIME, DATE, TIMESTAMP, YEAR | BIT(1), BOOLEAN | ENUM, SET, |
| CUBRID[155] | Static | SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | FLOAT, REAL(32-bit), DOUBLE(64-bit) | DECIMAL, NUMERIC | CHAR, VARCHAR, NCHAR, NVARCHAR, CLOB | BLOB | DATE, DATETIME, TIME, TIMESTAMP | BIT | MONETARY, BITVARYING, SET, MULTISET, SEQUENCE, ENUM |
| IBM Db2 | ? | SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | DECFLOAT, REAL, DOUBLE | DECIMAL | CLOB, CHAR, VARCHAR | BINARY, VARBINARY, BLOB | DATE, TIME, TIMESTAMPWITHTIMEZONE, TIMESTAMPWITHOUTTIMEZONE | BOOLEAN | XML, GRAPHIC, VARGRAPHIC, DBCLOB, ROWID |
| Empress Embedded Database | Static | TINYINT, SQL_TINYINT, or INTEGER8; SMALLINT, SQL_SMALLINT, or INTEGER16; INTEGER, INT, SQL_INTEGER, or INTEGER32; BIGINT, SQL_BIGINT, or INTEGER64 | REAL, SQL_REAL, or FLOAT32; DOUBLEPRECISION, SQL_DOUBLE, or FLOAT64; FLOAT, or SQL_FLOAT; EFLOAT | DECIMAL, DEC, NUMERIC, SQL_DECIMAL, or SQL_NUMERIC; DOLLAR | CHARACTER, ECHARACTER, CHARACTERVARYING, NATIONALCHARACTER, NATIONALCHARACTERVARYING, NLSCHARACTER, CHARACTERLARGEOBJECT, TEXT, NATIONALCHARACTERLARGEOBJECT, NLSTEXT | BINARYLARGEOBJECT or BLOB; BULK | DATE, EDATE, TIME, ETIME, EPOCH_TIME, TIMESTAMP, MICROTIMESTAMP | BOOLEAN | SEQUENCE 32, SEQUENCE |
| EXASolution | Static | TINYINT, SMALLINT, INTEGER, BIGINT, | REAL, FLOAT, DOUBLE | DECIMAL, DEC, NUMERIC, NUMBER | CHAR, NCHAR, VARCHAR, VARCHAR2, NVARCHAR, NVARCHAR2, CLOB, NCLOB | N/A | DATE, TIMESTAMP, INTERVAL | BOOLEAN, BOOL | GEOMETRY |
| FileMaker[156] | Static | Not Supported | Not Supported | NUMBER | TEXT | CONTAINER | TIMESTAMP | Not Supported | |
| Firebird[157] | ? | INT128, INT64, INTEGER, SMALLINT | DOUBLE, FLOAT | DECIMAL, NUMERIC, DECIMAL(38, 4), DECIMAL(10, 4) | BLOB, CHAR, CHAR(x)CHARACTERSETUNICODE_FSS, VARCHAR(x)CHARACTERSETUNICODE_FSS, VARCHAR | BLOBSUB_TYPETEXT, BLOB | DATE, TIME, TIMESTAMP (without time zone and with time zone) | BOOLEAN | TIMESTAMP, TIMESTAMP WITH TIME ZONE, CHAR(38), User defined types (Domains) |
| Type system | Integer | Floating point | Decimal | String | Binary | Date/Time | Boolean | Other | |
| HSQLDB[158] | Static | TINYINT (8-bit), SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | DOUBLE (64-bit) | DECIMAL, NUMERIC | CHAR, VARCHAR, LONGVARCHAR, CLOB | BINARY, VARBINARY, LONGVARBINARY, BLOB | DATE, TIME, TIMESTAMP, INTERVAL | BOOLEAN | OTHER (object), BIT, BITVARYING, ARRAY |
| Informix Dynamic Server[159] | Static + UDT | SMALLINT (16-bit), INT (32-bit), INT8 (64-bit proprietary), BIGINT (64-bit) | SMALLFLOAT (32-bit), FLOAT (64-bit) | DECIMAL (32 decimal digits float/fixed, range 10130 to +10125), MONEY | CHAR, VARCHAR, NCHAR, NVARCHAR, LVARCHAR, CLOB, TEXT, LONGLVARCHAR | TEXT, BYTE, BLOB, CLOB | DATE, DATETIME, INTERVAL | BOOLEAN | SET, LIST, MULTISET, ROW, TIMESERIES, SPATIAL, GEODETIC, NODE, JSON, BSON, USERDEFINEDTYPES |
| Ingres[160] | Static | TINYINT (8-bit), SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | FLOAT4 (32-bit), FLOAT (64-bit) | DECIMAL | C, CHAR, VARCHAR, LONGVARCHAR, NCHAR, NVARCHAR, LONGNVARCHAR, TEXT | BYTE, VARBYTE, LONGVARBYTE (BLOB) | DATE, ANSIDATE, INGRESDATE, TIME, TIMESTAMP, INTERVAL | N/A | MONEY, OBJECT_KEY, TABLE_KEY, USER-DEFINEDDATATYPES (via OME) |
| Linter SQL RDBMS | Static + Dynamic (in stored procedures) | SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | REAL(32-bit), DOUBLE(64-bit) | DECIMAL, NUMERIC | CHAR, VARCHAR, NCHAR, NVARCHAR, BLOB | BYTE, VARBYTE, BLOB | DATE | BOOLEAN | GEOMETRY, EXTFILE |
| MariaDB[161] | Static | TINYINT (8-bit), SMALLINT (16-bit), MEDIUMINT (24-bit), INT (32-bit), BIGINT (64-bit) | FLOAT (32-bit), DOUBLE (aka REAL) (64-bit) | DECIMAL | CHAR, BINARY, VARCHAR, VARBINARY, TEXT, TINYTEXT, MEDIUMTEXT, LONGTEXT | TINYBLOB, BLOB, MEDIUMBLOB, LONGBLOB | DATETIME, DATE, TIMESTAMP, YEAR | BIT(1), BOOLEAN (aka BOOL) = synonym for TINYINT | ENUM, SET, GIS data types (Geometry, Point, Curve, LineString, Surface, Polygon, GeometryCollection, MultiPoint, MultiCurve, MultiLineString, MultiSurface, MultiPolygon) |
| Microsoft SQL Server[162] | Static | TINYINT, SMALLINT, INT, BIGINT | FLOAT, REAL | NUMERIC, DECIMAL, SMALLMONEY, MONEY | CHAR, VARCHAR, TEXT, NCHAR, NVARCHAR, NTEXT | BINARY, VARBINARY, IMAGE, FILESTREAM, FILETABLE | DATE, DATETIMEOFFSET, DATETIME2, SMALLDATETIME, DATETIME, TIME | BIT | CURSOR, TIMESTAMP, HIERARCHYID, UNIQUEIDENTIFIER, SQL_VARIANT, XML, TABLE, Geometry, Geography, Custom .NET datatypes |
| Microsoft SQL Server Compact (Embedded Database)[163] | Static | TINYINT, SMALLINT, INT, BIGINT | FLOAT, REAL | NUMERIC, DECIMAL, MONEY | NCHAR, NVARCHAR, NTEXT | BINARY, VARBINARY, IMAGE | DATETIME | BIT | TIMESTAMP, ROWVERSION, UNIQUEIDENTIFIER, IDENTITY, ROWGUIDCOL |
| Mimer SQL | Static | SMALLINT, INT, BIGINT, INTEGER(n) | FLOAT, REAL, DOUBLE, FLOAT(n) | NUMERIC, DECIMAL | CHAR, VARCHAR, NCHAR, NVARCHAR, CLOB, NCLOB | BINARY, VARBINARY, BLOB | DATE, TIME, TIMESTAMP, INTERVAL | BOOLEAN | DOMAINS, USER-DEFINED TYPES (including the pre-defined spatial data types location, latitude, longitude and coordinate, and UUID) |
| MonetDB | Static, extensible | TINYINT, SMALLINT, INT, INTEGER, BIGINT, HUGEINT, SERIAL, BIGSERIAL | FLOAT, FLOAT(n), REAL, DOUBLE, DOUBLEPRECISION | DECIMAL, NUMERIC | CHAR, CHAR(n), VARCHAR(n), CLOB, CLOB(n), TEXT, STRING | BLOB, BLOB(n) | DATE, TIME, TIMEWITHTIMEZONE, TIMESTAMP, TIMESTAMPWITHTIMEZONE, INTERVALMONTH, INTERVALDAY, INTERVALSECOND | BOOLEAN | JSON, JSON(n), URL, URL(n), INET, UUID, GIS data types (Geometry, Point, Curve, LineString, Surface, Polygon, GeometryCollection, MultiPoint, MultiCurve, MultiLineString, MultiSurface, MultiPolygon), User Defined Types |
| MySQL[154] | Static | TINYINT (8-bit), SMALLINT (16-bit), MEDIUMINT (24-bit), INT (32-bit), BIGINT (64-bit) | FLOAT (32-bit), DOUBLE (aka REAL) (64-bit) | DECIMAL | CHAR, BINARY, VARCHAR, VARBINARY, TEXT, TINYTEXT, MEDIUMTEXT, LONGTEXT | TINYBLOB, BLOB, MEDIUMBLOB, LONGBLOB | DATETIME, DATE, TIMESTAMP, YEAR | BIT(1), BOOLEAN (aka BOOL) = synonym for TINYINT | ENUM, SET, GIS data types (Geometry, Point, Curve, LineString, Surface, Polygon, GeometryCollection, MultiPoint, MultiCurve, MultiLineString, MultiSurface, MultiPolygon) |
| OpenLink Virtuoso[164] | Static + Dynamic | INT, INTEGER, SMALLINT | REAL, DOUBLEPRECISION, FLOAT, FLOAT(n) | DECIMAL, DECIMAL(n), DECIMAL(m, n), NUMERIC, NUMERIC(n), NUMERIC(m, n) | CHARACTER, CHAR(n), VARCHAR, VARCHAR(n), NVARCHAR, NVARCHAR(n) | BLOB | TIMESTAMP, DATETIME, TIME, DATE | N/A | ANY, REFERENCE (IRI, URI), UDT (User Defined Type), GEOMETRY (BOX, BOX2D, BOX3D, BOXM, BOXZ, BOXZM, CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, EMPTY, GEOMETRYCOLLECTION, GEOMETRYCOLLECTIONM, GEOMETRYCOLLECTIONZ, GEOMETRYCOLLECTIONZM, LINESTRING, LINESTRINGM, LINESTRINGZ, LINESTRINGZM, MULTICURVE, MULTILINESTRING, MULTILINESTRINGM, MULTILINESTRINGZ, MULTILINESTRINGZM, MULTIPOINT, MULTIPOINTM, MULTIPOINTZ, MULTIPOINTZM, MULTIPOLYGON, MULTIPOLYGONM, MULTIPOLYGONZ, MULTIPOLYGONZM, POINT, POINTM, POINTZ, POINTZM, POLYGON, POLYGONM, POLYGONZ, POLYGONZM, POLYLINE, POLYLINEZ, RING, RINGM, RINGZ, RINGZM) |
| Type system | Integer | Floating point | Decimal | String | Binary | Date/Time | Boolean | Other | |
| Oracle[165] | Static + Dynamic (through ANYDATA) | NUMBER | BINARY_FLOAT, BINARY_DOUBLE | NUMBER | CHAR, VARCHAR2, CLOB, NCLOB, NVARCHAR2, NCHAR, LONG (deprecated) | BLOB, RAW, LONGRAW (deprecated), BFILE | DATE, TIMESTAMP (with/without TIMEZONE), INTERVAL | N/A | SPATIAL, IMAGE, AUDIO, VIDEO, DICOM, XMLType, UDT, JSON |
| Actian Zen (PSQL)[166] | Static | BIGINT, INTEGER, SMALLINT, TINYINT, UBIGINT, UINTEGER, USMALLINT, UTINYINT | BFLOAT4, BFLOAT8, DOUBLE, FLOAT | DECIMAL, NUMERIC, NUMERICSA, NUMERICSLB, NUMERICSLS, NUMERICSTB, NUMERICSTS | CHAR, LONGVARCHAR, VARCHAR | BINARY, LONGVARBINARY, VARBINARY | DATE, DATETIME, TIME | BIT | CURRENCY, IDENTITY, SMALLIDENTITY, TIMESTAMP, UNIQUEIDENTIFIER |
| Polyhedra[167] | Static | INTEGER8 (8-bit), INTEGER(16-bit), INTEGER (32-bit), INTEGER64 (64-bit) | FLOAT32 (32-bit), FLOAT (aka REAL; 64-bit) | N/A | VARCHAR, LARGEVARCHAR (aka CHARACTERLARGEOBJECT) | LARGEBINARY (aka BINARYLARGEOBJECT) | DATETIME | BOOLEAN | N/A |
| PostgreSQL[168] | Static | SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | REAL (32-bit), DOUBLEPRECISION (64-bit) | DECIMAL, NUMERIC | CHAR, VARCHAR, TEXT | BYTEA | DATE, TIME (with/without TIMEZONE), TIMESTAMP (with/without TIMEZONE), INTERVAL | BOOLEAN | ENUM, POINT, LINE, LSEG, BOX, PATH, POLYGON, CIRCLE, CIDR, INET, MACADDR, BIT, UUID, XML, JSON, JSONB, arrays, composites, ranges, custom |
| SAP HANA | Static | TINYINT, SMALLINT, INTEGER, BIGINT | SMALLDECIMAL, REAL, DOUBLE, FLOAT, FLOAT(n) | DECIMAL | VARCHAR, NVARCHAR, ALPHANUM, SHORTTEXT | VARBINARY, BINTEXT, BLOB | DATE, TIME, SECONDDATE, TIMESTAMP | BOOLEAN | CLOB, NCLOB, TEXT, ARRAY, ST_GEOMETRY, ST_POINT, ST_MULTIPOINT, ST_LINESTRING, ST_MULTILINESTRING, ST_POLYGON, ST_MULTIPOLYGON, ST_GEOMETRYCOLLECTION, ST_CIRCULARSTRING |
| solidDB | Static | TINYINT (8-bit), SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | REAL (32-bit), DOUBLE (64-bit), FLOAT (64-bit) | DECIMAL, NUMERIC (51 digits) | CHAR, VARCHAR, LONGVARCHAR, WCHAR, WVARCHAR, LONGWVARCHAR | BINARY, VARBINARY, LONGVARBINARY | DATE, TIME, TIMESTAMP | ||
| SQLite[169] | Dynamic | INTEGER (64-bit) | REAL (aka FLOAT, DOUBLE) (64-bit) | N/A | TEXT (aka CHAR, CLOB) | BLOB | N/A | N/A | N/A |
| SQream DB[170] | Static | TINYINT (8-bit), SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | REAL (32-bit), DOUBLE (aka FLOAT) (64-bit) | N/A | CHAR, VARCHAR, NVARCHAR | N/A | DATE, DATETIME (aka TIMESTAMP) | BOOL | N/A |
| Type system | Integer | Floating point | Decimal | String | Binary | Date/Time | Boolean | Other | |
| Teradata | Static | BYTEINT (8-bit), SMALLINT (16-bit), INTEGER (32-bit), BIGINT (64-bit) | FLOAT (64-bit) | DECIMAL, NUMERIC (38 digits) | CHAR, VARCHAR, CLOB | BYTE, VARBYTE, BLOB | DATE, TIME, TIMESTAMP (w/wo TIMEZONE) | PERIOD, INTERVAL, GEOMETRY, XML, JSON, UDT (User Defined Type) | |
| UniData | Dynamic | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| UniVerse | Dynamic | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Type system | Integer | Floating point | Decimal | String | Binary | Date/Time | Boolean | Other |
Other objects
[edit]Information about what other objects are supported natively.
| Data domain | Cursor | Trigger | Function1 | Procedure1 | External routine1 | |
|---|---|---|---|---|---|---|
| 4th Dimension | Yes | No | Yes | Yes | Yes | Yes |
| ADABAS | ? | Yes | ? | Yes? | Yes? | Yes |
| Adaptive Server Enterprise | Yes | Yes | Yes | Yes | Yes | Yes |
| Advantage Database Server | Yes | Yes | Yes | Yes | Yes | Yes |
| Altibase | Yes | Yes | Yes | Yes | Yes | Yes |
| Apache Derby | No | Yes | Yes | Yes2 | Yes2 | Yes2 |
| ClustrixDB | No | Yes | No | Yes | Yes | Yes |
| CUBRID | Yes | Yes | Yes | Yes | Yes2 | Yes |
| Empress Embedded Database | Yes via RANGE CHECK | Yes | Yes | Yes | Yes | Yes |
| EXASolution | Yes | No | No | Yes | Yes | Yes |
| IBM Db2 | Yes via CHECK CONSTRAINT | Yes | Yes | Yes | Yes | Yes |
| Firebird | Yes | Yes | Yes | Yes | Yes | Yes |
| HSQLDB | Yes | No | Yes | Yes | Yes | Yes |
| H2 | Yes | No | Yes2 | Yes2 | Yes2 | Yes |
| Informix Dynamic Server | Yes via CHECK | Yes | Yes | Yes | Yes | Yes 5 |
| Ingres | Yes | Yes | Yes | Yes | Yes | Yes |
| InterBase | Yes | Yes | Yes | Yes | Yes | Yes |
| Linter SQL RDBMS | No | Yes | Yes | Yes | Yes | No |
| LucidDB | No | Yes | No | Yes2 | Yes2 | Yes2 |
| MariaDB | Yes[171] | Yes | Yes | Yes | Yes | Yes |
| MaxDB | Yes | Yes | Yes | Yes | Yes | ? |
| Microsoft Access (JET) | Yes | No | No | No | Yes, But single DML/DDL Operation | Yes |
| Microsoft Visual Foxpro | No | Yes | Yes | Yes | Yes | Yes |
| Microsoft SQL Server | Yes | Yes | Yes | Yes | Yes | Yes |
| Microsoft SQL Server Compact (Embedded Database) | No | Yes | No | No | No | No |
| Mimer SQL | Yes | Yes | Yes | Yes | Yes | No |
| MonetDB | No | No | Yes | Yes | Yes | Yes |
| MySQL | No 3 | Yes | Yes | Yes | Yes | Yes |
| Oracle | Yes | Yes | Yes | Yes | Yes | Yes |
| Oracle Rdb | Yes | Yes | Yes | Yes | Yes | Yes |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes | Yes | Yes |
| Actian Zen (PSQL) | Yes | Yes | Yes | Yes | Yes | No |
| Polyhedra DBMS | No | No | Yes | Yes | Yes | Yes |
| PostgreSQL | Yes | Yes | Yes | Yes | Yes | Yes |
| SAP HANA | ? | ? | ? | ? | ? | ? |
| solidDB | Yes | Yes | Yes | Yes | Yes | Yes |
| SQL Anywhere | Yes | Yes | Yes | Yes | Yes | Yes |
| SQLite | No | No | Yes | No | No | Yes |
| Teradata | No | Yes | Yes | Yes | Yes | Yes |
| UniData | No | No | Yes | Yes | Yes | Yes |
| UniVerse | No | No | Yes | Yes | Yes | Yes |
| Data domain | Cursor | Trigger | Function1 | Procedure1 | External routine1 |
- Note (1): Both function and procedure refer to internal routines written in SQL and/or procedural language like PL/SQL. External routine refers to the one written in the host languages, such as C, Java, Cobol, etc. "Stored procedure" is a commonly used term for these routine types. However, its definition varies between different database vendors.
- Note (2): In Derby, H2, LucidDB, and CUBRID, users code functions and procedures in Java.
- Note (3): ENUM datatype exists. CHECK clause is parsed, but not enforced in runtime.
- Note (5): Informix supports external functions written in Java, C, & C++.
Partitioning
[edit]Information about what partitioning methods are supported natively.
| Range | Hash | Composite (Range+Hash) | List | Expression | Round Robin | |
|---|---|---|---|---|---|---|
| 4th Dimension | ? | ? | ? | ? | ? | ? |
| ADABAS | ? | ? | ? | ? | ? | ? |
| Adaptive Server Enterprise | Yes | Yes | No | Yes | ? | ? |
| Advantage Database Server | No | No | No | No | ? | ? |
| Altibase | Yes | Yes | No | Yes | ? | ? |
| Apache Derby | No | No | No | No | ? | ? |
| ClustrixDB | Yes | No | No | No | No | ? |
| CUBRID | Yes | Yes | No | Yes | ? | ? |
| IBM Db2 | Yes | Yes | Yes | Yes | Yes | ? |
| Empress Embedded Database | No | No | No | No | ? | ? |
| EXASolution | No | Yes | No | No | No | ? |
| Firebird | No | No | No | No | ? | ? |
| HSQLDB | No | No | No | No | ? | ? |
| H2 | No | No | No | No | ? | ? |
| Informix Dynamic Server | Yes | Yes | Yes | Yes | Yes | Yes |
| Ingres | Yes | Yes | Yes | Yes | ? | ? |
| InterBase | No | No | No | No | ? | ? |
| Linter SQL RDBMS | No | No | No | No | No | ? |
| MariaDB | Yes | Yes | Yes | Yes | ? | ? |
| MaxDB | No | No | No | No | ? | ? |
| Microsoft Access (JET) | No | No | No | No | ? | ? |
| Microsoft Visual Foxpro | No | No | No | No | ? | ? |
| Microsoft SQL Server | Yes | via computed column | via computed column | Yes | via computed column | ? |
| Microsoft SQL Server Compact (Embedded Database) | No | No | No | No | ? | ? |
| Mimer SQL | No | No | No | No | No | ? |
| MonetDB | Yes | No | No | No | Yes | ? |
| MySQL | Yes | Yes | Yes | Yes | ? | ? |
| Oracle | Yes | Yes | Yes | Yes | via Virtual Columns | ? |
| Oracle Rdb | Yes | Yes | ? | ? | ? | ? |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes | Yes | ? |
| Actian Zen (PSQL) | No | No | No | No | No | ? |
| Polyhedra DBMS | No | No | No | No | No | ? |
| PostgreSQL | Yes | Yes | Yes | Yes | Yes | ? |
| SAP HANA | Yes | Yes | Yes | Yes | Yes | ? |
| solidDB | Yes | No | No | No | ? | ? |
| SQL Anywhere | No | No | No | No | ? | ? |
| SQLite | No | No | No | No | ? | ? |
| Teradata | Yes | Yes | Yes | Yes | ? | ? |
| UniVerse | Yes | Yes | Yes | Yes | ? | ? |
| Range | Hash | Composite (Range+Hash) | List | Expression | Round Robin |
Access control
[edit]Information about access control functionalities.
| Native network encryption1 | Brute-force protection | Enterprise directory compatibility | Password complexity rules2 | Patch access3 | Run unprivileged4 | Audit | Resource limit | Security Certification | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4D | Yes (with SSL) | ? | Yes | ? | Yes | Yes | ? | ? | ? | ? | ? |
| Adaptive Server Enterprise | Yes (optional; to pay) | Yes | Yes (optional ?) | Yes | Partial (need to register; depend on which product)[172] | Yes | Yes | Yes | Yes | Yes (EAL4+ 1) | ? |
| Advantage Database Server | Yes | No | No | No | Yes | Yes | No | No | Yes | ? | ? |
| CUBRID | Yes (with SSL) | ? | No | No | Yes | Yes | Yes | Yes | Yes | ? | ? |
| IBM Db2 | Yes | ? | Yes (LDAP, Kerberos...) | Yes | ? | Yes | Yes | Yes | Yes | Yes (EAL4+6) | ? |
| Empress Embedded Database | ? | ? | No | No | Yes | Yes | Yes | No | Yes | No | ? |
| EXASolution | No | Yes | Yes (LDAP) | Yes | Yes | Yes | Yes | Yes | Yes | No | ? |
| Firebird | Yes | Yes[173] | Yes (Windows trusted authenification) | Yes (by custom plugin) | Yes (no security page)[174] | Yes | Yes[175] | Yes | No7 | ? | ? |
| HSQLDB | Yes | No | Yes | Yes | Yes | Yes | No | No | Yes | No | ? |
| H2 | Yes | Yes | ? | No | ? | Yes | ? | Yes | Yes | No | ? |
| Informix Dynamic Server | Yes | ? | Yes10 | ?10 | Yes | Yes | Yes | Yes | Yes | ? | Yes |
| Linter SQL RDBMS | Yes (with SSL) | Yes | Yes | Yes (length only) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| MariaDB | Yes (SSL) | No | Yes (with 5.2, but not on Windows servers) | Yes[176][177] | Yes[178] | Yes | ? | ? | ?8 | No | ? |
| Microsoft SQL Server | Yes | ? | Yes (Microsoft Active Directory) | Yes | Yes | Yes | Yes (From 2008) | Yes | Yes | Yes (EAL4+11) | ? |
| Microsoft SQL Server Compact (Embedded Database) | No (not relevant, only file permissions) | No (not relevant) | No (not relevant) | No (not relevant) | Yes | Yes (file access) | Yes | Yes | No | ? | ? |
| Mimer SQL | Yes | ? | ? | ? | Yes | Yes (depending on OS) | Yes | ? | Yes | ? | Yes |
| MySQL | Yes (SSL with 4.0) | No | Yes (with 5.5, but only in commercial edition) | No | Partial (no security page)[179] | Yes | ? | ? | ?8 | Yes | ? |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes (optional) | Yes (optional) | Yes | Yes (optional) | Yes (optional) | Yes | No | Yes (optional) |
| Oracle | Yes | Yes | Yes | Yes | ? | Yes | Yes | Yes | Yes | Yes (EAL21) | ? |
| Actian Zen (PSQL) | Yes | ? | No | No | Yes | Yes | Yes 12 | No | No | No | ? |
| Polyhedra DBMS | Yes (with SSL. Optional) | No | No | No | No | Yes | Yes 13 | Yes | Yes 13 | No | ? |
| PostgreSQL | Yes | Yes | Yes (LDAP, Kerberos...9) | Yes (with passwordcheck module) | Yes[180] | Yes | Yes (with pgaudit extension)[181] | Yes | Yes | Yes (EAL2+1) | ? |
| SAP HANA | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
| solidDB | No | No | Yes | No | No | Yes | Yes | No | No | No | No |
| SQL Anywhere | Yes | ? | Yes (Kerberos) | Yes | ? | Yes | Yes | No | Yes | Yes (EAL2+1 as Adaptive Server Anywhere) | ? |
| SQLite | No (not relevant, only file permissions) | No (not relevant) | No (not relevant) | No (not relevant) | Partial (no security page)[182] | Yes (file access) | Yes | Yes | No | No | ? |
| Teradata | Yes | No | Yes (LDAP, Kerberos...) | Yes | ? | Yes | Yes | Yes | Yes | Yes | Yes |
| Native network encryption1 | Brute-force protection | Enterprise directory compatibility | Password complexity rules2 | Patch access3 | Run unprivileged4 | Audit | Resource limit | Separation of duties (RBAC)5 | Security Certification |
- Note (1): Network traffic could be transmitted in a secure way (not clear-text, in general SSL encryption). Precise if option is default, included option or an extra modules to buy.
- Note (2): Options are present to set a minimum size for password, respect complexity like presence of numbers or special characters.
- Note (3): How do you get security updates? Is it free access, do you need a login or to pay? Is there easy access through a Web/FTP portal or RSS feed or only through offline access (mail CD-ROM, phone).
- Note (4): Does database process run as root/administrator or unprivileged user? What is default configuration?
- Note (5): Is there a separate user to manage special operation like backup (only dump/restore permissions), security officer (audit), administrator (add user/create database), etc.? Is it default or optional?
- Note (6): Common Criteria certified product list.[183]
- Note (7): FirebirdSQL seems to only have SYSDBA user and DB owner. There are no separate roles for backup operator and security administrator.
- Note (8): User can define a dedicated backup user but nothing particular in default install.[184]
- Note (9): Authentication methods.[185]
- Note (10): Informix Dynamic Server supports PAM and other configurable authentication. By default uses OS authentication.
- Note (11): Authentication methods.[186]
- Note (12): With the use of Pervasive AuditMaster.
- Note (13): User-based security is optional in Polyhedra, but when enabled can be enhanced to a role-based model with auditing.[187]
Databases vs schemas (terminology)
[edit] | This section possibly contains original research.(June 2010) |
The SQL specification defines what an "SQL schema" is; however, databases implement it differently. To compound this confusion the functionality can overlap with that of a parent database. An SQL schema is simply a namespace within a database; things within this namespace are addressed using the member operator dot ".". This seems to be a universal among all of the implementations.
A true fully (database, schema, and table) qualified query is exemplified as such: SELECT*FROMdatabase.schema.table
Both a schema and a database can be used to isolate one table, "foo", from another like-named table "foo". The following is pseudo code:
SELECT*FROMdatabase1.foovs.SELECT*FROMdatabase2.foo(no explicit schema between database and table)SELECT*FROM[database1.]default.foovs.SELECT*FROM[database1.]alternate.foo(no explicit database prefix)
The problem that arises is that former MySQL users will create multiple databases for one project. In this context, MySQL databases are analogous in function to PostgreSQL-schemas, insomuch as PostgreSQL deliberately lacks off-the-shelf cross-database functionality (preferring multi-tenancy) that MySQL has. Conversely, PostgreSQL has applied more of the specification implementing cross-table, cross-schema, and then left room for future cross-database functionality.
MySQL aliases schema with database behind the scenes, such that CREATE SCHEMA and CREATE DATABASE are analogs. It can therefore be said that MySQL has implemented cross-database functionality, skipped schema functionality entirely, and provided similar functionality into their implementation of a database. In summary, PostgreSQL fully supports schemas and multi-tenancy by strictly separating databases from each other and thus lacks some functionality MySQL has with databases, while MySQL does not even attempt to support standard schemas.
Oracle has its own spin where creating a user is synonymous with creating a schema. Thus a database administrator can create a user called PROJECT and then create a table PROJECT.TABLE. Users can exist without schema objects, but an object is always associated with an owner (though that owner may not have privileges to connect to the database). With the 'shared-everything' Oracle RAC architecture, the same database can be opened by multiple servers concurrently. This is independent of replication, which can also be used, whereby the data is copied for use by different servers. In the Oracle implementation, a 'database' is a set of files which contains the data while the 'instance' is a set of processes (and memory) through which a database is accessed.
Informix supports multiple databases in a server instance like MySQL. It supports the CREATE SCHEMA syntax as a way to group DDL statements into a single unit creating all objects created as a part of the schema as a single owner. Informix supports a database mode called ANSI mode which supports creating objects with the same name but owned by different users.
PostgreSQL and some other databases have support for foreign schemas, which is the ability to import schemas from other servers as defined in ISO/IEC 9075-9 (published as part of SQL:2008). This appears like any other schema in the database according to the SQL specification while accessing data stored either in a different database or a different server instance. The import can be made either as an entire foreign schema or merely certain tables belonging to that foreign schema.[188] While support for ISO/IEC 9075-9 bridges the gap between the two competing philosophies surrounding schemas, MySQL and Informix maintain an implicit association between databases while ISO/IEC 9075-9 requires that any such linkages be explicit in nature.
See also
[edit]- Relational database management system (includes market share data)
- List of relational database management systems
- Comparison of object–relational database management systems
- Comparison of database administration tools
- Object database – some of which have relational (SQL/ODBC) interfaces.
- IBM Business System 12 – an historical RDBMS and related query language.
References
[edit]- ^"Product Release Life Cycle". 10 January 2020.
- ^"Apache Derby: Downloads". Retrieved 2024-03-18.
- ^"- ASF JIRA". issues.apache.org.
- ^"cockroachdb Issue tracker". GitHub. Archived from the original on 2021-05-06. Retrieved 2021-05-03.
- ^"Issue Navigator - CUBRID Bug Tracking System". jira.cubrid.org.
- ^Stevens, O. (Oct–Dec 2009). "The History of Datacom/DB". Annals of the History of Computing. 31 (4). IEEE: 87–91. doi:10.1109/MAHC.2009.108. ISSN 1058-6180. S2CID 16803811.
- ^"CA Datacom - CA Technologies". Archived from the original on 2016-02-14. Retrieved 2014-07-06.
- ^"Datacom Product Sheet"(PDF).
- ^"IBM unveils Db2 12.1". 21 October 2024. Retrieved 6 December 2024.
- ^"Release 5.0.2". 12 February 2025. Retrieved 20 February 2025.
- ^IPL, Firebird SQL
- ^IDPL, Firebird SQL
- ^"Firebird RDBMS Issue Tracker". Archived from the original on 2008-08-28. Retrieved 2017-11-01.
- ^"HyperSQL Database Engine (HSQLDB) / Bugs". sourceforge.net.
- ^"Issues · h2database/h2database". GitHub.
- ^"Actian X & Ingres - Lifecycle Dates".
- ^"Linter Techsupport". Archived from the original on 2019-03-27. Retrieved 2019-04-04.
- ^"Release 11.7.2". 13 February 2025. Retrieved 25 February 2025.
- ^"MariaDB licenses".
- ^"- Jira". jira.mariadb.org.
- ^"MaxDB PTS - Problem Tracking". maxdb.sap.com.
- ^"Explore SQL Server 2022 capabilities". Retrieved 6 January 2023.
- ^"MonetDB Foundation". 4 April 2023.
- ^"MonetDB Latest Release". 26 August 2024.
- ^MonetDB License MPL2.0, MonetDB Foundation, 8 February 2022
- ^"MonetDB Issues". GitHub. Archived from the original on 2021-05-13. Retrieved 2021-06-08.
- ^mSQL, Products, AU: Hughes, archived from the original on 2009-10-15, retrieved 2009-09-13
- ^"Changes in MySQL 8.0.38 (2024-07-01, General Availability)". 1 July 2024. Retrieved 1 July 2024.
- ^"MySQL Bugs". bugs.mysql.com.
- ^"Issues · openlink/virtuoso-opensource · GitHub". GitHub. Archived from the original on 2020-12-23. Retrieved 2017-11-01.
- ^"Oracle Database 23c: The Next Long Term Support Release".
- ^"Oracle Rdb Product Family Compatibility Matrix". oracle.com.
- ^Polyhedra Lite In-Memory Relational Database System Freeware Available Now from Enea, Press Release, EECatalog.
- ^"PostgreSQL 17.4, 16.8, 15.12, 14.17, and 13.20 Released!". PostgreSQL. The PostgreSQL Global Development Group. 2025-02-20. Retrieved 2025-02-21.
- ^"PostgreSQL: License". www.postgresql.org.
- ^"A bug tracker for PostgreSQL? [LWN.net]". lwn.net.
- ^"SQLite Release 3.49.1 On 2025-02-18". 18 February 2025. Retrieved 19 February 2025.
- ^"SQLite: Ticket Main Menu". www.sqlite.org.
- ^SQream DB Version 2.1 SQL Reference Guide, SQream Technologies, archived from the original on 2018-02-12, retrieved 2018-02-12
- ^"Bug Reports".
- ^"Release 8.5.1". 17 January 2025. Retrieved 30 January 2025.
- ^"Issues · pingcap/Tidb". GitHub.
- ^"yugabyte/yugabyte-db". github.com.
- ^"Issues · yugabyte/Yugabyte-db". GitHub.
- ^"Firebird: The true open source database for Windows, Linux, Mac OS X and more".
- ^"Ingres 11.0 Documentation". docs.actian.com.
- ^"Building MariaDB on Mac OS X using Homebrew". AskMonty KnowledgeBase. Archived from the original on October 20, 2011. Retrieved September 30, 2011.
- ^https://play.google.com/store/apps/details?id=com.esminis.server.mariadb&hl=de MariaDB Android Version by Tautvydas Andrikys
- ^"Announcing SQL Server on Linux". 7 March 2016.
- ^"Mimer SQL is now available for OpenVMS on x86". 31 March 2023.
- ^http://techotv.com/run-apache-mysql-php-http-web-server-android-os-phone-tablet/ Run Apache, Mysql, Php – Web server on Android mobile or Tablet
- ^"Aminet - dev/Gg/Postgresql632-mos-bin.lha". Archived from the original on 2017-03-14. Retrieved 2017-03-14.
- ^"PostgreSQL - Oss4zos". Archived from the original on 2015-05-27. Retrieved 2013-08-15.
- ^"Lock granularity". db.apache.org.
- ^"DB2 for Linux UNIX and Windows 9.7.0>Fundamentos de DB2>Performance tuning>Factors affecting performance>Application design>Concurrency issues>Isolation levels". Archived from the original on 2014-04-15. Retrieved 2014-04-14.
- ^"Advanced".
- ^ abcd"Transactional DDL in PostgreSQL: A Competitive Analysis - PostgreSQL wiki". wiki.postgresql.org.
- ^"[MDEV-4259] transactional DDL - Jira". jira.mariadb.org.
- ^"SQL Server Transaction Locking and Row Versioning Guide".
- ^"MySQL :: MySQL 5.6 Reference Manual :: 8.10.1 Internal Locking Methods". Archived from the original on 2018-03-06. Retrieved 2018-03-05.
- ^"dba-oracle.com".
- ^"Polyhedra 8.7 new headline feature: locking".
- ^"PostgreSQL: Documentation: Explicit Locking : Row-Level Locks". Archived from the original on 2021-05-13. Retrieved 2021-05-13.
- ^Lane, Tom (April 13, 2011). "Re: BUG #5974: UNION construct type cast gives poor error message". PostgreSQL Mailing List Archives.
- ^"SAP Help Portal". help.sap.com.
- ^"SAP Help Portal". help.sap.com.
- ^"SAP Help Portal". help.sap.com.
- ^"File Locking And Concurrency In SQLite Version 3". www.sqlite.org.
- ^SQLite Full Unicode support is optional and not installed by default in most systems (like Android, Debian...)
- ^"TiDB Features". docs.pingcap.com.
- ^"MySQL - The InnoDB Storage Engine".
- ^"InnoDB - Oracle Wiki".
- ^"MySQL 5.6 Reference Manual".
- ^"Identifier Names". MariaDB KnowledgeBase. Retrieved 26 September 2014.
- ^"PostgreSQL Limits". Retrieved 2021-05-13.
- ^"Large Objects: Introduction". Retrieved 2021-05-13.
- ^"Date/Time Types". Retrieved 2021-05-13.
- ^"SAP Help Portal". help.sap.com.
- ^Technical Specifications, Guide, Firebird SQL, archived from the original on 2010-06-15, retrieved 2008-03-30
- ^Library, MSDN, Microsoft, 21 May 2024
- ^ ab"Column count limit", Reference Manual, MySQL 5.1 Documentation, Oracle
- ^"Row-Overflow Considerations", TechNet Library, SQL Server Documentation, Microsoft, 2012
- ^"Date functions", Language, SQLite
- ^Online books, Sybase, archived from the original on 2005-10-23
- ^Informix Performance Guide, Info Centre, IBM
- ^Dynamic Materialized Views in MySQL, Pure, Red Noize, 2005, archived from the original on 2006-04-23
- ^"Derby", Full Text Indexing, Search, Issues, Apache
- ^ abc"CUBRID 9.0 release". Archived from the original on 2013-02-14. Retrieved 2013-02-05.
- ^Full-text search with Db2 Text Search, Developer Works, IBM
- ^Does Firebird support full-text search?, Firebird FAQ
- ^Fulltext Search, Tutorial, H2 Database
- ^Create Spatial Index, Grammar, H2 Database
- ^Informix 15.0.0 online documentation, IBM, 19 November 2024
- ^Full Text Search Functions(PDF), Documentation, RU: Linter, archived from the original(PDF) on 2011-08-20, retrieved 2010-06-06
- ^ abSPATIAL INDEX, MariaDB, mariadb.com, retrieved 24 September 2017
- ^"Storage Engine Index Types". mariadb.com. Retrieved 25 April 2016.
- ^Virtual Columns - MariaDB Knowledge Base
- ^"Fulltext Index Overview". mariadb.com. Retrieved 25 April 2016.
- ^Does Microsoft Access have Full Text Search?, Questions, Stack Overflow
- ^"Microsoft SQL Server Full-Text Search", Library, MSDN, Microsoft
- ^"Spatial Indexing Overview", Library, Tech Net, Microsoft, 4 October 2012
- ^"Microsoft SQL Server Compact Full-text search is not available", Forums, MSDN, Microsoft
- ^Index Types Per Storage Engine, MySQL, Oracle, retrieved 24 September 2017
- ^"Feature request #4990: Functional Indexes", Bugs, MySQL, Oracle
- ^"Feature request #13979: InnoDB engine doesn't support FULLTEXT", Bugs, MySQL, Oracle
- ^"MySQL v5.6.4 Release Notes", Release Notes, MySQL, Oracle
- ^Creating Spatial Indexes, MySQL, Oracle
- ^Changes in MySQL 5.7.5, Oracle
- ^Does Oracle support full text search?, Questions, Stack Overflow
- ^"Location Features for Database 11g", Spatial & Locator, Tech Network, Oracle
- ^"Oracle / PLSQL: ORA-01408 Error Message". www.techonthenet.com.
- ^Index Types, Documentation, PostgreSQL community, 11 November 2021
- ^Full Text Search, Documentation, PostgreSQL community, 11 November 2021
- ^Building Spatial Indexes, PostGIS Manual, The PostGIS Development Group, archived from the original on 2021-05-03, retrieved 2021-05-13
- ^"The SQLite R*Tree Module". www.sqlite.org.
- ^"Indexes On Expressions". sqlite.org.
- ^"SQLite FTS5 Extension". www.sqlite.org.
- ^SpatiaLite, IT: Gaia GIS 2.3.1, archived from the original on 2011-07-22, retrieved 2010-12-06
- ^Full-Text Search, Online Publications, Teradata
- ^geospatial
- ^UDF, Ad Hoc Data, archived from the original on 2019-09-14, retrieved 2007-01-11
- ^"Create DB", Library, MSDN, Microsoft
- ^"SQL", Library, MSDN, Microsoft
- ^Petkovic, Dusan (2005). Microsoft SQL Server 2005: A Beginner's Guide. McGraw-Hill Professional. p. 300. ISBN 978-0-07-226093-9.
- ^"InnoDB adaptive Hash", Reference manual 5.0, Development documentation, Oracle
- ^= "Forest of Trees", Informix 15.0 online documentation, Development documentation, IBM
{{citation}}: Check|chapter-url=value (help) - ^"Article", Library, Developer Works, IBM
- ^ abcdef"What's new in MariaDB 10.3".
- ^ ab"HyperSQL 2.5 New Features". hsqldb.org.
- ^"Advanced". h2database.com.
- ^"Functions". www.h2database.com.
- ^Clay, David (January 1, 1993). "Informix parallel data query (PDQ)". IEEE Computer Society Press. pp. 71–73 – via ACM Digital Library.
- ^"Ingres".
- ^"Ingres".
- ^"Ingres".
- ^"INTERSECT". mariadb.com.
- ^"EXCEPT". mariadb.com.
- ^"CTE implemented in 10.2.2". mariadb.org. Retrieved 26 July 2017.
- ^"Window Functions Overview". mariadb.com. Retrieved 25 April 2016.
- ^ ab"Feature request #1542: Parallel query", Bugs, MySQL, Oracle
- ^Only very limited functions available before SQL Server 2012, Microsoft
- ^"SQL Server Parallel Query Processing", Library, MSDN, Microsoft, 4 October 2012
- ^"INTERSECT". mysql.com.
- ^"EXCEPT". mysql.com.
- ^"Feature request #16244: SQL-99 Derived table WITH clause (CTE)", Bugs, MySQL, Oracle
- ^Window Functions, mysql.com, retrieved 20 July 2021
- ^Parallel Query, Wiki, Ora FAQ
- ^"New Features Oracle 12.1.0.1". Archived from the original on 2020-10-25.
- ^Parallel Query, PostgreSQL, 11 August 2022
- ^"SQLite Release 3.43.0 On 2023-08-24". sqlite.org.
- ^"The WITH Clause". sqlite.org.
- ^"Window Functions". sqlite.org.
- ^"Data Types", General Reference, HDB, Altibase
- ^ ab"10. Data Types", Reference manual, MySQL 5.0, Oracle
- ^"Data Types", CUBRID SQL Guide, Reference Manual, CUBRID[permanent dead link]
- ^"FileMaker 14 Tech Specs". FileMaker=May 12, 2015.
- ^"Migration from MS-SQL to Firebird". Firebird Project. Retrieved April 12, 2015.
- ^"General: HSQLDB data types", Guide, 2.0 Documents, HSQLDB
- ^"IBM Informix Guide to SQL: Reference, v11.50 (SC23-7750-04)". Publications. IBM. 20 August 2001. Retrieved August 7, 2013.
- ^"3: Understanding SQL Data Types", SQL 9.3 Reference Guide, Documents, Ingres, archived from the original on 2011-07-13, retrieved 2009-11-16
- ^"Data Types". mariadb.com. Retrieved 25 April 2016.
- ^"SQL Server Data Types", Library, MSDN, Microsoft, 21 May 2024
- ^"SQL Server Compact Data Types", Library, MSDN, Microsoft, 24 March 2011
- ^"Datatypes", SQL Reference, OpenLink Software
- ^"Data Types", SQL 11.2 Reference, Server documents, Oracle, archived from the original on 2010-03-14, retrieved 2009-09-21
- ^"Data Types", Pervasive PSQL Supported Data Types, Product documentation, Pervasive
- ^Polyhedra SQL Reference Manual, Product documentation, Enea AB, archived from the original on 2013-10-04, retrieved 2013-04-23
- ^"Data Types", Manual, PostgreSQL 10 Documentation, PostgreSQL community, 11 August 2022
- ^Datatypes, SQLite 3
- ^SQream SQL Reference Guide, SQream Technologies
- ^"Constraint". mariadb.com.
- ^Support, Downloads, Sybase, retrieved 2008-09-07[dead link]
- ^"Release", Engine, Development, Firebird SQL 2.0
- ^Files, Firebird SQL
- ^"Trace and Audit Services". Firebird Project. Retrieved April 12, 2015.
- ^"cracklib_password_check". mariadb.com. Retrieved 9 December 2014.
- ^"simple_password_check". mariadb.com. Retrieved 9 December 2014.
- ^"Security Vulnerabilities Fixed in MariaDB". mariadb.com. Retrieved 25 April 2016.
- ^"Downloads", Development, MySQL, Oracle
- ^Security, Support, PostgreSQL community, archived from the original on 2011-11-01, retrieved 2018-03-05
- ^Open Source PostgreSQL Audit Logging, September 2022
- ^Download, SQLite
- ^DB, Products, Common Criteria Portal, retrieved 2021-05-13
- ^Backup MySQL, How to, Gentoo wiki, archived from the original on 2008-09-02, retrieved 2008-09-07
- ^Authentication methods, 8.1 Documents, PostgreSQL community, 24 July 2014
- ^Common Criteria (CC, ISO15408), Microsoft, archived from the original on 2014-02-13
- ^Adding audit trails to a Polyhedra IMDB database, White paper, Enea AB
- ^"PostgreSQL: Documentation: IMPORT FOREIGN SCHEMA". www.postgresql.org. Retrieved 2016-06-11.
External links
[edit]
Wikibooks has a book on the topic of: SQL dialects reference
- Comparison of different SQL implementations against SQL standards. Includes Oracle, Db2, Microsoft SQL Server, MySQL and PostgreSQL. (8 June 2007)
- The SQL92 standard
- DMBS comparison by SQL Workbench
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