The Employee table holds all employees. Every employee has an Id, and there is also a column for the department Id.
+----+-------+--------+--------------+ | Id | Name | Salary | DepartmentId | +----+-------+--------+--------------+ | 1 | Joe | 70000 | 1 | | 2 | Henry | 80000 | 2 | | 3 | Sam | 60000 | 2 | | 4 | Max | 90000 | 1 | | 5 | Janet | 69000 | 1 | | 6 | Randy | 85000 | 1 | +----+-------+--------+--------------+
The Department table holds all departments of the company.
+----+----------+ | Id | Name | +----+----------+ | 1 | IT | | 2 | Sales | +----+----------+
Write a SQL query to find employees who earn the top three salaries in each of the department. For the above tables, your SQL query should return the following rows.
1 # Write your MySQL query statement below 2 select d.Name as Department,e.Name as Employee,e.Salary 3 from Department d,Employee e 4 where d.Id=e.DepartmentId 5 and 3>( 6 select count(distinct Salary) 7 from Employee 8 where Salary>e.Salary 9 and DepartmentId = e.DepartmentId 10 );
【SQL】185. Department Top Three Salaries
原文：http://www.cnblogs.com/fcyworld/p/6498858.html