| 3198 | Find Cities in Each State | Solution | | Easy | |
| 3172 | Second Day Verification | Solution | | Easy | |
| 3150 | Invalid Tweets II | Solution | | Easy | |
| 3059 | Find All Unique Email Domains | Solution | | Easy | |
| 3051 | Find Candidates for Data Scientist Position | Solution | | Easy | |
| 2990 | Loan Types | Solution | | Easy | |
| 2879 | Display the First Three Rows | Python3 | | Easy | |
| 2205 | The Number of Users That Are Eligible for Discount | Solution | | Easy | |
| 2082 | The Number of Rich Customers | Solution | | Easy | |
| 2072 | The Winner University | Solution | | Easy | |
| 2026 | Low-Quality Problems | Solution | | Easy | |
| 1978 | Employees Whose Manager Left the Company | Solution | | Easy | |
| 1873 | Calculate Special Bonus | Solution | | Easy | |
| 1853 | Convert Date Format | Solution | | Easy | |
| 1821 | Find Customers With Positive Revenue this Year | Solution | | Easy | |
| 1809 | Ad-Free Sessions | Solution | | Easy | |
| 1795 | Rearrange Products Table | Solution | | Easy | |
| 1789 | Primary Department for Each Employee | Solution | | Easy | |
| 1757 | Recyclable and Low Fat Products | Solution | | Easy | |
| 1741 | Find Total Time Spent by Each Employee | Solution | | Easy | |
| 1729 | Find Followers Count | Solution | | Easy | |
| 1709 | Biggest Window Between Visits | Solution | | Medium | |
| 1693 | Daily Leads and Partners | Solution | | Easy | |
| 1683 | Invalid Tweets | Solution | | Easy | |
| 1677 | Product's Worth Over Invoices | Solution | | Easy | |
| 1667 | Fix Names in a Table | Solution | | Easy | |
| 1661 | Average Time of Process per Machine | Solution | | Easy | |
| 1633 | Percentage of Users Attended a Contest | Solution | | Easy | |
| 1623 | All Valid Triplets That Can Represent a Country | Solution | | Easy | |
| 1607 | Sellers With No Sales | Solution | | Easy | |
| 1596 | The Most Frequently Ordered Products for Each Customer | Solution | | Medium | |
| 1571 | Warehouse Manager | Solution | | Easy | |
| 1587 | Bank Account Summary II | Solution | | Easy | |
| 1581 | Customer Who Visited but Did Not Make Any Transactions | Solution | | Easy | |
| 1565 | Unique Orders and Customers Per Month | Solution | | Easy | |
| 1543 | Fix Product Name Format | Solution | | Easy | |
| 1527 | Patients With a Condition | Solution | | Easy | |
| 1517 | Find Users With Valid E-Mails | Solution | | Easy | |
| 1511 | Customer Order Frequency | Solution | | Easy | |
| 1495 | Friendly Movies Streamed Last Month | Solution | | Easy | |
| 1435 | Create a Session Bar Chart | Solution | | Easy | |
| 1484 | Group Sold Products By The Date | Solution | | Easy | |
| 1445 | Apples & Oranges | Solution | | Medium | |
| 1407 | Top Travellers | Solution | | Easy | |
| 1393 | Capital Gain/Loss | Solution | | Easy | |
| 1384 | Total Sales Amount by Year | Solution | | Hard | |
| 1378 | Replace Employee ID With The Unique Identifier | Solution | | Easy | |
| 1371 | The Number of Employees Which Report to Each Employee | Solution | | Easy | |
| 1369 | Get the Second Most Recent Activity | Solution | | Hard | |
| 1364 | Number of Trusted Contacts of a Customer | Solution | | Medium | |
| 1355 | Activity Participants | Solution | | Medium | |
| 1350 | Students With Invalid Departments | Solution | | Easy | |
| 1341 | Movie Rating | Solution | | Medium | |
| 1327 | List the Products Ordered in a Period | Solution | | Easy | |
| 1322 | Ads Performance | Solution | | Easy | |
| 1308 | Running Total for Different Genders | Solution | | Medium | |
| 1303 | Find the Team Size | Solution | | Easy | |
| 1294 | Weather Type in Each Country | Solution | | Easy | |
| 1285 | Find the Start and End Number of Continuous Ranges | Solution | | Medium | |
| 1280 | Students and Examinations | Solution | 📺 | Easy | |
| 1270 | All People Report to the Given Manager | Solution | | Medium | |
| 1251 | Average Selling Price | Solution | | Easy | |
| 1241 | Number of Comments per Post | Solution | | Easy | |
| 1211 | Queries Quality and Percentage | Solution | | Easy | |
| 1179 | Reformat Department Table | Solution | | Easy | |
| 1173 | Immediate Food Delivery I | Solution | | Easy | |
| 1148 | Article Views I | Solution | | Easy | |
| 1142 | User Activity for the Past 30 Days II | Solution | | Easy | |
| 1141 | User Activity for the Past 30 Days I | Solution | | Easy | |
| 1113 | Reported Posts | Solution | | Easy | |
| 1084 | Sales Analysis III | Solution | | Easy | |
| 1083 | Sales Analysis II | Solution | | Easy | |
| 1082 | Sales Analysis I | Solution | | Easy | |
| 1076 | Project Employees II | Solution | | Easy | |
| 1075 | Project Employees I | Solution | | Easy | |
| 1069 | Product Sales Analysis II | Solution | | Easy | |
| 1068 | Product Sales Analysis I | Solution | | Easy | |
| 1050 | Actors and Directors Who Cooperated At Least Three Times | Solution | | Easy | |
| 627 | Swap Salary | Solution | | Easy | |
| 626 | Exchange Seats | Solution | | Medium | |
| 620 | Not Boring Movies | Solution | | Easy | |
| 619 | Biggest Single Number | Solution | | Easy | |
| 618 | Students Report By Geography | Solution | | Hard | Session Variables |
| 615 | Average Salary: Departments VS Company | Solution | | Hard | |
| 614 | Second Degree Follower | Solution | | Medium | Inner Join |
| 613 | Shortest Distance in a Line | Solution | | Easy | |
| 612 | Shortest Distance in a Plane | Solution | | Medium | |
| 610 | Triangle Judgement | Solution | | Easy | |
| 608 | Tree Node | Solution | | Medium | Union |
| 607 | Sales Person | Solution | | Easy | |
| 603 | Consecutive Available Seats | Solution | | Easy | |
| 602 | Friend Requests II: Who Has the Most Friends | Solution | | Medium | |
| 601 | Human Traffic of Stadium | Solution | | Hard | |
| 597 | Friend Requests I: Overall Acceptance Rate | Solution | | Easy | |
| 596 | Classes More Than 5 Students | Solution | | Easy | |
| 595 | Big Countries | Solution | | Easy | |
| 586 | Customer Placing the Largest Number of Orders | Solution | | Easy | |
| 585 | Investments in 2016 | Solution | | Medium | |
| 584 | Find Customer Referee | Solution | | Easy | |
| 580 | Count Student Number in Departments | Solution | | Medium | Left Join |
| 578 | Get Highest Answer Rate Question | Solution | | Medium | |
| 577 | Employee Bonus | Solution | | Easy | |
| 574 | Winning Candidate | Solution | | Medium | |
| 571 | Find Median Given Frequency of Numbers | Solution | | Hard | |
| 570 | Managers with at Least 5 Direct Reports | Solution | | Medium | |
| 569 | Median Employee Salary | Solution | | Hard | |
| 534 | Game Play Analysis III | Solution | | Easy | |
| 512 | Game Play Analysis II | Solution | | Easy | |
| 511 | Game Play Analysis I | Solution | | Easy | |
| 262 | Trips and Users | Solution | | Hard | Inner Join |
| 197 | Rising Temperature | Solution | | Easy | |
| 196 | Delete Duplicate Emails | Solution | | Easy | |
| 185 | Department Top Three Salaries | Solution | | Hard | |
| 184 | Department Highest Salary | Solution | | Medium | |
| 183 | Customers Who Never Order | Solution | | Easy | |
| 182 | Duplicate Emails | Solution | | Easy | |
| 181 | Employees Earning More Than Their Managers | Solution | | Easy | |
| 180 | Consecutive Numbers | Solution | | Medium | |
| 178 | Rank Scores | Solution | | Medium | |
| 177 | Nth Highest Salary | Solution | | Medium | |
| 176 | Second Highest Salary | Solution | | Easy | |
| 175 | Combine Two Tables | Solution | | Easy | |
