181. 超过经理收入的员工
# Write your MySQL query statement below
select a.Name as 'Employee'
from Employee as a,Employee as b
where a.ManagerId=b.Id
and a.Salary>b.Salary;
1.employee的表出现了两次，分别命名为a，b，因为只有一个表要使用两次，为了避免二义性才用不同的名字
2.注意结果那里显示的列名是：Employee而原表是 Name