leetcode181超过经理收入的员工

leetcode 181 Employees Earning More Than Their Managers

Posted by BY on August 23, 2020

前言

持续更新了

正文

问题来源

本问题来自leetcode上的181题。

问题描述

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。 表结构与数据

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

查询:

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

分析:

select a.Name as Employee from Employee a, Employee b where a.ManagerId = b.Id and a.Salary > b.Salary;

总结:

勤思考。

结语

不管怎么样好好加油。