写着写着就通过了, 有没有大佬来给我解释一下. 虽然测试通过了, 但是我都读不懂了

select temp.dept_no,temp.emp_no,temp1.maxSalary from (select dept_no,d.emp_no,salary from dept_emp as d 
                    left join salaries as s on d.emp_no = s.emp_no) temp 
    right join 
              (select dept_no, max(salary) as maxSalary from (select dept_no,d.emp_no,salary from dept_emp as d 
                                                                    left join salaries as s on d.emp_no = s.emp_no) temp
                    group by dept_no) temp1 
    on temp.salary = temp1.maxSalary and temp.dept_no = temp1.dept_no
    order by temp.dept_no asc

以上..............😑😑😐😐😐