[LeetCode] Employees Earning More Than Their Managers

标签：code   from   color   logs   sql   hat   ever   als   for   

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      |
+----------+

# Write your MySQL query statement below
# 1
SELECT employer.Name AS Employee FROM Employee employer JOIN Employee manager ON employer.ManagerId=manager.Id WHERE employer.Salary>manager.Salary;
# 2
SELECT employer.Name AS Employee FROM Employee employer,Employee manager WHERE employer.ManagerId=manager.Id AND employer.Salary>manager.Salary;

[LeetCode] Employees Earning More Than Their Managers

标签：code   from   color   logs   sql   hat   ever   als   for   

原文地址：http://www.cnblogs.com/immjc/p/7719480.html