题解 | #获取每个部门中当前员工薪水最高的相关信息#

select
    de.dept_no,
    de.emp_no,
    T.M
from
    dept_emp de inner join 
    (select
        de.dept_no,
        max(s.salary) M
    from
        dept_emp de
        inner join salaries s
        on de.emp_no = s.emp_no
    group by de.dept_no) T 
    inner join salaries sa 
    on sa.salary = T.M 
    and de.dept_no = T.dept_no
    and  de.emp_no=sa.emp_no

order by de.dept_no;