181. Employees Earning More Than Their Managers

The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id.

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

Given the Employee table, write a SQL query that finds out employees who earn more than their managers. For the above table, Joe is the only employee who earns more than his manager.

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

1 # Write your MySQL query statement below
2 SELECT e1.Name AS Employee 
3 FROM Employee AS e1, Employee AS e2
4 WHERE e1.ManagerId = e2.Id AND e1.Salary > e2.Salary

 

posted @ 2020-02-12 14:56  hyx1  阅读(121)  评论(0编辑  收藏  举报