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
左反筛选空值即可 select employees.emp_no from employees left join dept_manager on employees.emp_no=dept_manager.emp_no where dept_no is null;
