184. Department Highest Salary

The Employee table holds all employees. Every employee has an Id, a salary, 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            |+----+-------+--------+--------------+

The Department table holds all departments of the company.

+----+----------+| Id | Name     |+----+----------+| 1  | IT       || 2  | Sales    |+----+----------+

Write a SQL query to find employees who have the highest salary in each of the departments. For the above tables, Max has the highest salary in the IT department and Henry has the highest salary in the Sales department.

+------------+----------+--------+| Department | Employee | Salary |+------------+----------+--------+| IT         | Max      | 90000  || Sales      | Henry    | 80000  |+------------+----------+--------+

Subscribe to see which companies asked this question.

MySQL:

# Write your MySQL query statement belowselect     dd.Department   as Department,    ee.Name         as Employee,    dd.Salary       as Salaryfrom    Employee ee,    (    select         max(e.DepartmentId)     as DepartmentId,        d.Name                  as Department,        max(e.Salary)           as Salary    from        Employee e,        Department d    where        e.DepartmentId = d.Id    group by        d.Name    ) ddwhere    ee.Salary = dd.Salary    and ee.DepartmentId = dd.DepartmentId;