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, salary as maxsalary from dept_emp d join salaries using (emp_no) where (dept_no, salary) in (select dept_no, max(salary) from salaries s join dept_emp using (emp_no) group by dept_no ) order by dept_no