leetcode:部门工资最高的员工

https://leetcode-cn.com/problems/department-highest-salary/

#on -> where 
select d.Name Department , e.Name Employee , e.Salary 
from Employee e join Department d on d.Id = e.DepartmentId
where (e.DepartmentId , e.Salary) in 
(select DepartmentId , Max(Salary) from Employee group by DepartmentId);