LeetCode（数据库）- 上级经理已离职的公司员工

Posted 2022-01-21 程序员牧码

题目链接：点击打开链接

题目大意：略。

解题思路：略。

AC 代码

-- 解决方案(1)
select a.employee_id
  from Employees a
 where a.salary < 30000
   AND a.manager_id is not null
   AND not exists
 (select 1 from Employees b where a.manager_id = b.employee_id)
ORDER BY a.employee_id;

-- 解决方案(2)
SELECT employee_id
FROM Employees
WHERE salary < 30000 AND manager_id NOT IN (SELECT employee_id FROM Employees)
ORDER BY 1