题解 | #获取每个部门中当前员工薪水最高的相关信息#
获取每个部门中当前员工薪水最高的相关信息
https://www.nowcoder.com/practice/4a052e3e1df5435880d4353eb18a91c6
select dept_no,emp_no,salary from (select dept_no,dept_emp.emp_no,salary,rank()over(partition by dept_no order by salary desc)rk from dept_emp join salaries on dept_emp.emp_no=salaries.emp_no) as a where a.rk=1 order by dept_no
直接用一个排序窗口函数就可以了,为什么好多用group by的