181. Employees Earning More Than Their Managers
2018-01-19 16:30
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The
Employeetable 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
Employeetable, 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 | +----------+
自连接
找出比其上司挣得更多的员工
MySQL(1686ms):
1 SELECT e1.Name AS Employee 2 FROM Employee AS e1 , Employee AS e2 3 WHERE e1.ManagerId = e2.Id 4 AND e1.Salary > e2.Salary ;
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