题解 | #获取所有非manager的员工emp_no#
获取所有非manager的员工emp_no
http://www.nowcoder.com/practice/32c53d06443346f4a2f2ca733c19660c
方法一:
select e.emp_no from employees as e where e.emp_no not in (select emp_no from dept_manager)
方法二:
select e.emp_no from employees as e left join dept_manager as d on e.emp_no=d.emp_no where d.dept_no is NULL