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标题6:MySQL-Employees Earning More Than Their Managers_mysql

mysql 搞代码 7年前 (2018-06-08) 168次浏览 已收录 0个评论

题目6:mysql———-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      | +----------+

题目解答:

select E1.Name  from Employee as E1, Employee as E2  where E1.ManagerId = E2.Id and E1.Salary > E2.Salary

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