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  • 【SQL】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  |
    +------------+----------+--------+
    # Write your MySQL query statement below
    select d.Name Department, e.Name Employee, e.Salary
    from Employee e,Department d
    where e.DepartmentId=d.Id
    and (e.DepartmentId,e.Salary) in
        (
        select DepartmentId,max(Salary)
        from Employee
        group by DepartmentId
        );
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  • 原文地址:https://www.cnblogs.com/fcyworld/p/6498812.html
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