181-sql.md

181. Employees Earning More Than Their Managers

难度: Easy

刷题内容

原题连接

• https://leetcode.com/problems/employees-earning-more-than-their-managers/

内容描述

SQL Schema
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      |
+----------+

解题方案

思路 1

beats 24.26%

select e1.Name as Employee 
from Employee as e1, Employee as e2 
where e1.ManagerId=e2.Id 
And e1.Salary > e2.Salary;

思路2

select 
    Name Employee
from  
    Employee as a
where
    Salary > (select  Salary from Employee where Id=a.ManagerId)