easy_181.sql

/*## easy: 181. Employees Earning More Than Their Managers

### TASK 

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      |
    +----------+
*/

-- SOLUTION: # Write your MySQL query statement below 
SELECT 
    e1.name AS Employee
FROM 
    employee AS e1, employee AS e2
WHERE
    e1.managerId = e2.id AND 
    e1.salary > e2.salary;