LeetCode - Employees Earning More Than Their Managers

Description：

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

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

选出比经理工资高的员工名字

思路是表的自身连接

# Write your MySQL query statement below
select first.Name from Employee first, Employee second
where first.ManagerId=second.Id and first.Salary > second.Salary;