LeetCode 181. Employees Earning More Than Their Managers

Description

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

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      |
+----------+

Explanation

select the same table twice. The first select is to get employee salary, the second select is to get manager’s salary.

SQL Solution

# Write your MySQL query statement below
select Name as Employee from Employee e where e.Salary > (SELECT Salary FROM Employee m WHERE m.Id = e.ManagerId)