leetCode/sql/超过经理收入的员工.md
2020-02-23 22:02:58 +08:00

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题目:

Employee 表包含所有员工,他们的经理也属于员工。每个员工都有一个 Id此外还有一列对应员工的经理的 Id。

+----+-------+--------+-----------+
| Id | Name  | Salary | ManagerId |
+----+-------+--------+-----------+
| 1  | Joe   | 70000  | 3         |
| 2  | Henry | 80000  | 4         |
| 3  | Sam   | 60000  | NULL      |
| 4  | Max   | 90000  | NULL      |
+----+-------+--------+-----------+

给定 Employee 表,编写一个 SQL 查询该查询可以获取收入超过他们经理的员工的姓名。在上面的表格中Joe 是唯一一个收入 超过他的经理的员工。

+----------+
| Employee |
+----------+
| Joe      |
+----------+

答案

select a.Name as Employee
 from Employee a, (select Salary,Id from Employee) b
 where a.ManagerId=b.Id and a.Salary > b.Salary