LeetCode Department Highest Salary, leetcodehighest

LeetCode Department Highest Salary, leetcodehighest

TheEmployeeTable 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            |+----+-------+--------+--------------+

TheDepartmentTable holds all except ments 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 orders. 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  |+------------+----------+--------+

select p.department as Department, e2.name as Employee, p.salary from (    select d.name as department,     d.id as departmentid,    max(e1.salary) as salary     from Employee e1, Department d     where e1.departmentid = d.id     group by d.name, d.id) as p, Employee e2 where e2.departmentid = p.departmentid and e2.salary = p.salary;