题解 | 获取每个部门中薪水最高的员工相关信息
select d.dept_no, d.emp_no, s.salary from dept_emp d join salaries s on d.emp_no=s.emp_no where (d.dept_no, s.salary) in (select de.dept_no, max(sa.salary) salary from dept_emp de join salaries sa on de.emp_no=sa.emp_no group by de.dept_no order by max(sa.salary) desc ) order by d.dept_no asc