185. 部门工资前三高的所有员工（求组内前几的值）

求每个部门工资前三的员工

参考链接：https://leetcode-cn.com/problems/department-top-three-salaries/solution/185-bu-men-gong-zi-qian-san-gao-de-yuan-gong-by-li/

SELECT
	Department.NAME AS Department,
	e1.NAME AS Employee,
	e1.Salary AS Salary 
FROM
	Employee AS e1,Department 
WHERE
	e1.DepartmentId = Department.Id 
	AND 3 > (SELECT  count( DISTINCT e2.Salary ) 
			 FROM	Employee AS e2 
			 WHERE	e1.Salary < e2.Salary 	AND e1.DepartmentId = e2.DepartmentId 	) 
ORDER BY Department.NAME,Salary DESC;