数据库相关
数据库相关
- 595. Big Countries
- 627. Swap Salary
- 620. Not Boring Movies
- 596. Classes More Than 5 Students
- 182. Duplicate Emails
- 196. Delete Duplicate Emails
- 175. Combine Two Tables
- 181. Employees Earning More Than Their Managers
- 183. Customers Who Never Order
- 184. Department Highest Salary
- 176. Second Highest Salary
- 177. Nth Highest Salary
- 178. Rank Scores
- 180. Consecutive Numbers
- 626. Exchange Seats