步骤分解

1.将salaries和dept_manager两个表,以dept_manager为主表,进行连接,并查找薪水详情(salaries表中所有字段)以及dept_manager表中的dept_no

select s.*, d.dept_no
from dept_manager d left join salaries s
on d.emp_no = s.emp_no

或者

select s.*, d.dept_no
from salaries s right join dept_manager d
on d.emp_no = s.emp_no

2.将1的查询结果,按照salaries.emp_no升序排序

order by s.emp_no

完整答案

select s.*, d.dept_no
from dept_manager d left join salaries s
on d.emp_no = s.emp_no
order by s.emp_no;