Employees Earning More Than Their Managers Leetcode SQL

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      |

+----------+

这题用的是self join 的方法 选出 ManagerID 再将Salary作为比较条件即可得到答案。

# Write your MySQL query statement below
SELECT A.Name From Employee A,Employee B
WHERE A.ManagerId=B.Id and A.Salary>B.Salary