超过经理收入的员工

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

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

给定Employee表，编写一个SQL查询，该查询可以获取收入超过他们经理的员工的姓名。在上面的表格中，Joe是唯一一个收入超过他的经理的员工。

使用where语句

• Runtime: 283 ms, faster than 98.21%
• Memory Usage: 0B, less than 100.00%

SELECT 
  a.Name as 'Employee'
FROM 
  Employee as a,
  Employee as b
WHERE 
  a.managerId = b.Id 
    AND a.Salary > b.Salary

使用JOIN

• Runtime: 684 ms, faster than 12.80%
• Memory Usage: 0B, less than 100.00%

SELECT 
  a.name as 'Employee'
FROM 
  Employee as a join Employee as b
ON a.managerId = b.Id 
  AND a.Salary > b.Salary