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 |
+----------+

SELECT
     a.NAME AS Employee
FROM Employee AS a JOIN Employee AS b
     ON a.ManagerId = b.Id
     AND a.Salary > b.Salary
;

SELECT      a.NAME AS Employee FROM Employee AS a JOIN Employee AS b      ON a.ManagerId = b.Id      AND a.Salary > b.Salary ; SELECT     a.NAME AS Employee FROM Employee AS a JOIN Employee AS b     ON a.ManagerId = b.Id     AND a.Salary > b.Salary ;

SELECT

　　a.NAME AS Employee

FROM Employee AS a JOIN Employee AS b

　　ON a.ManagerId = b.Id

　　AND a.Salary > b.Salary

;

SELECT

　　a.NAME AS Employee

FROM Employee AS a JOIN Employee AS b

　　ON a.ManagerId = b.Id

　　AND a.Salary > b.Salary

;