题解 | #获取每个部门中当前员工薪水最高的相关信息#

select dept_no,d.emp_no,mss
from dept_emp d
join salaries s
on d.emp_no = s.emp_no
join (select d.dept_no dd, max(salary) mss
from dept_emp d
join salaries s
on d.emp_no = s.emp_no
group by dept_no) ms
on d.dept_no = ms.dd
where s.salary = ms.mss
group by d.dept_no
order by dept_no;