refactor 185

Author: fishercoder1534

database/_185.sql

@@ -1,39 +1,3 @@
---185. Department Top Three Salaries
--- 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.
---
---+------------+----------+--------+
---| Department | Employee | Salary |
---+------------+----------+--------+
---| IT         | Max      | 90000  |
---| IT         | Randy    | 85000  |
---| IT         | Joe      | 70000  |
---| Sales      | Henry    | 80000  |
---| Sales      | Sam      | 60000  |
---+------------+----------+--------+
---
-
 select D.Name as Department, E.Name as Employee, E.Salary as Salary
 from Department D, Employee E
 where (select(count(distinct(salary))) from Employee