184. 部门工资最高的员工

 

184. 部门工资最高的员工

需要注意的几个点，inner join可以缩减成join，取的是两个表的交集

in关键词，找的是当前所要找的数值是否在指定的范围之中

# Write your MySQL query statement below
select d.Name as Department,
       e.Name as Employee,
       e.Salary 
       from Employee e inner join Department d on e.DepartmentId = d.Id
       where (DepartmentId, e.Salary)
       in
       (select DepartmentId, max(Salary) from Employee group by DepartmentId);    

 

这个是有问题的版本，暂时还不知道怎么改，只是提示group by使用错误

# Write your MySQL query statement below 
select d.Name as Department, e1.Name as Employee, 
max(e1.Salary) as Salary from Employee e1, Employee e2, 
Department d where e1.Salary >= max(e2.Salary) 
and 
e1.DepartmentId = e2.DepartmentId group by e1.Id order by e1.Salary desc;