The SQL 50 on LeetCode touches on basic to intermediate SQL topics that includes easy, medium, and hard level questions on topics below.
This github repository contains my solutions for the Top SQL 50 problems using MS SQL Server syntax.
| # | Problem | Level | Status |
|---|---|---|---|
| 1757 | Recyclable and Low Fat Products | Easy | Solved |
| 584 | Find Customer Referee | Easy | Solved |
| 595 | Big Countries | Easy | Solved |
| 1148 | Article Views | Easy | Solved |
| 1683 | Invalid Tweets | Easy | Solved |
| # | Problem | Level | Status |
|---|---|---|---|
| 1378 | Replace Employee ID With The Unique Identifier | Easy | Solved |
| 1068 | Product Sales Analysis I | Easy | Solved |
| 1581 | Customer Who Visited but Did Not Make Any Transactions | Easy | Solved |
| 197 | Rising Temperature | Easy | Solved |
| 1661 | Average Time of Process per Machine | Easy | Solved |
| 577 | Employee Bonus | Easy | Solved |
| 1280 | Students and Examinations | Easy | Solved |
| 570 | Managers with at Least 5 Direct Reports | Medium | Solved |
| 1934 | Confirmation Rate | Medium | Solved |
| # | Problem | Level | Status |
|---|---|---|---|
| 620 | Not Boring Movies | Easy | Solved |
| 1251 | Average Selling Price | Easy | Solved |
| 1075 | Project Employees I | Easy | Solved |
| 1633 | Percentage of Users Attended a Contest | Easy | Solved |
| 1211 | Queries Quality and Percentage | Easy | Solved |
| 1193 | Monthly Transactions I | Medium | Solved |
| 1174 | Immediate Food Delivery II | Medium | Solved |
| 550 | Game Play Analysis IV | Medium | Solved |
| # | Problem | Level | Status |
|---|---|---|---|
| 2356 | Number of Unique Subjects Taught by Each Teacher | Easy | Solved |
| 1141 | User Activity for the Past 30 Days I | Easy | Solved |
| 1070 | Product Sales Analysis III | Medium | Solved |
| 596 | Classes More Than 5 Students | Easy | Solved |
| 1729 | Find Followers Count | Easy | Solved |
| 619 | Biggest Single Number | Easy | Solved |
| 1045 | Customers Who Bought All Products | Medium | Solved |
| # | Problem | Level | Status |
|---|---|---|---|
| 1731 | The Number of Employees Which Report to Each Employee | Easy | Solved |
| 1789 | Primary Department for Each Employee | Easy | Solved |
| 610 | Triangle Judgement | Easy | Solved |
| 180 | Consecutive Numbers | Medium | Solved |
| 1164 | Product Price at a Given Date | Medium | Solved |
| 1204 | Last Person to Fit in the Bus | Medium | - |
| 1907 | Count Salary Categories | Medium | - |
| # | Problem | Level | Status |
|---|---|---|---|
| 1978 | Employees Whose Manager Left the Company | Easy | Solved |
| 626 | Exchange Seats | Medium | - |
| 1341 | Movie Rating | Medium | - |
| 1321 | Restaurant Growth | Medium | Solved |
| 602 | Friend Requests II: Who Has the Most Friends | Medium | - |
| 585 | Investments in 2016 | Medium | - |
| 185 | Department Top Three Salaries | Hard | Solved |
| # | Problem | Level | Status |
|---|---|---|---|
| 1667 | Fix Names in a Table | Easy | - |
| 1527 | Patients with a Condition | Easy | - |
| 196 | Delete Duplicate Emails | Easy | Solved |
| 176 | Second Highest Salary | Medium | Solved |
| 1484 | Group Sold Products By The Date | Easy | - |
| 1327 | List the Products Ordered in a Period | Easy | - |
| 1517 | Find Users With Valid E-mails | Easy | Solved |