题解 | #获取所有非manager的员工emp_no#
获取所有非manager的员工emp_no
https://www.nowcoder.com/practice/32c53d06443346f4a2f2ca733c19660c
select e.emp_no from employees e where e.emp_no not in (select d.emp_no from dept_manager d where d.emp_no = e.emp_no);
子查询-单列查询 not in
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