题解 | #获取所有员工当前的manager#
获取所有员工当前的manager
https://www.nowcoder.com/practice/e50d92b8673a440ebdf3a517b5b37d62
select
a.emp_no emp_no,
b.emp_no manager
from
dept_emp a
left join dept_manager b on a.dept_no = b.dept_no
where
a.emp_no ! = b.emp_no
and a.dept_no = b.dept_no
万物左连接