Problem: 181. 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 |

+----------+

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Solution 1:

SELECT e.name Employee FROM Employee AS e, Employee AS e1

WHERE e.ManagerId = e1.Id AND e.Salary > e1.Salary;

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Solution 2:

Select emp.Name from Employee emp

inner join Employee manager on emp.ManagerId = manager.Id

where emp.Salary > manager.Salary

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