在中文站没找到对应的集合，想来自己动手拷贝过来，方便大家面试复习用，对应英文站点： https://leetcode.com/studyplan/top-sql-50/

Select

1. #1757. 可回收且低脂的产品
   • 链接: https://leetcode.cn/problems/recyclable-and-low-fat-products/
2. #584. 寻找用户推荐人
   • 链接: https://leetcode.cn/problems/find-customer-referee/
3. #595. 大的国家
   • 链接: https://leetcode.cn/problems/big-countries/
4. #1148. 文章浏览 I
   • 链接: https://leetcode.cn/problems/article-views-i/
5. #1683. 无效的推文
   • 链接: https://leetcode.cn/problems/invalid-tweets/

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Basic Joins

6. #1378. 使用唯一标识码替换员工ID
   • 链接: https://leetcode.cn/problems/replace-employee-id-with-the-unique-identifier/
7. #1068. 产品销售分析 I
   • 链接: https://leetcode.cn/problems/product-sales-analysis-i/
8. #1581. 进店却未进行过交易的顾客
   • 链接: https://leetcode.cn/problems/customer-who-visited-but-did-not-make-any-transactions/
9. #197. 上升的温度
   • 链接: https://leetcode.cn/problems/rising-temperature/
10. #1661. 每台机器的平均处理时间
    • 链接: https://leetcode.cn/problems/average-time-of-process-per-machine/
11. #577. 员工奖金
    • 链接: https://leetcode.cn/problems/employee-bonus/
12. #1280. 学生们参加各科测试的次数
    • 链接: https://leetcode.cn/problems/students-and-examinations/
13. #570. 至少有5名直接下属的经理
    • 链接: https://leetcode.cn/problems/managers-with-at-least-5-direct-reports/
14. #1934. 确认率
    • 链接: https://leetcode.cn/problems/confirmation-rate/
15. #620. 有趣的电影
    • 链接: https://leetcode.cn/problems/not-boring-movies/

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Basic Aggregate Functions

16. #1251. 平均售价
    • 链接: https://leetcode.cn/problems/average-selling-price/
17. #1075. 项目员工 I
    • 链接: https://leetcode.cn/problems/project-employees-i/
18. #1633. 各赛事的用户注册率
    • 链接: https://leetcode.cn/problems/percentage-of-users-attended-a-contest/
19. #1211. 查询结果的质量和占比
    • 链接: https://leetcode.cn/problems/queries-quality-and-percentage/
20. #1141. 查询近30天活跃用户数
    • 链接: https://leetcode.cn/problems/user-activity-for-the-past-30-days-i/

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Sorting and Grouping

21. #1084. 销售分析 III
    • 链接: https://leetcode.cn/problems/sales-analysis-iii/
22. #596. 超过5名学生的课
    • 链接: https://leetcode.cn/problems/classes-more-than-5-students/
23. #1729. 求关注者的数量
    • 链接: https://leetcode.cn/problems/find-followers-count/
24. #619. 只出现一次的最大数字
    • 链接: https://leetcode.cn/problems/biggest-single-number/
25. #1731. 每位经理的下属员工数量
    • 链接: https://leetcode.cn/problems/the-number-of-employees-which-report-to-each-employee/
26. #183. 从不订购的客户
    • 链接: https://leetcode.cn/problems/customers-who-never-order/

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Advanced Select and Joins

27. #1789. 首位 K 个员工的主要部门
    • 链接: https://leetcode.cn/problems/primary-department-for-each-employee/
28. #610. 判断三角形
    • 链接: https://leetcode.cn/problems/triangle-judgement/
29. #180. 连续出现的数字
    • 链接: https://leetcode.cn/problems/consecutive-numbers/
30. #1164. 指定日期的产品价格
    • 链接: https://leetcode.cn/problems/product-price-at-a-given-date/
31. #1204. 最后一个人
    • 链接: https://leetcode.cn/problems/last-person-to-fit-in-the-bus/
32. #1978. 上级经理已离职的员工
    • 链接: https://leetcode.cn/problems/employees-whose-manager-left-a-company/

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Subqueries

33. #184. 部门工资最高的员工
    • 链接: https://leetcode.cn/problems/department-highest-salary/
34. #585. 2016年的投资
    • 链接: https://leetcode.cn/problems/investments-in-2016/
35. #1341. 电影评分
    • 链接: https://leetcode.cn/problems/movie-rating/
36. #602. 好友申请 II ：谁有最多的好友
    • 链接: https://leetcode.cn/problems/friend-requests-ii-who-has-the-most-friends/
37. #1321. 餐馆营业额变化增长
    • 链接: https://leetcode.cn/problems/restaurant-growth/
38. #185. 部门工资前三高的所有员工
    • 链接: https://leetcode.cn/problems/department-top-three-salaries/

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Advanced String Functions / Regex / Clause

39. #1484. 按日期分组销售产品
    • 链接: https://leetcode.cn/problems/group-sold-products-by-the-date/
40. #1527. 患某种疾病的患者
    • 链接: https://leetcode.cn/problems/patients-with-a-condition/
41. #196. 删除重复的电子邮箱
    • 链接: https://leetcode.cn/problems/delete-duplicate-emails/
42. #176. 第二高的薪水
    • 链接: https://leetcode.cn/problems/second-highest-salary/
43. #1667. 修复表中的名字
    • 链接: https://leetcode.cn/problems/fix-names-in-a-table/
44. #1517. 查找拥有有效邮箱的用户
    • 链接: https://leetcode.cn/problems/find-users-with-valid-e-mails/

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Complicated Stuff

45. #1193. 每月交易 I
    • 链接: https://leetcode.cn/problems/monthly-transactions-i/
46. #1174. 即时食物配送 II
    • 链接: https://leetcode.cn/problems/immediate-food-delivery-ii/
47. #550. 游戏玩法分析 IV
    • 链接: https://leetcode.cn/problems/game-play-analysis-iv/
48. #2356. 每位教师所教授的科目种类的数量
    • 链接: https://leetcode.cn/problems/number-of-unique-subjects-taught-by-each-teacher/
49. #1070. 产品销售分析 III
    • 链接: https://leetcode.cn/problems/product-sales-analysis-iii/
50. #1907. 按分类统计薪水
    • 链接: https://leetcode.cn/problems/count-salary-categories/