关键字exists查找未分配具体部门的员工的所有信息
使用含有关键字exists查找未分配具体部门的员工的所有信息。
https://www.nowcoder.com/practice/c39cbfbd111a4d92b221acec1c7c1484
/* SELECT column_name(s) FROM table_name WHERE EXISTS (SELECT column_name FROM table_name WHERE condition); */ select * from employees where not exists (select emp_no from dept_emp where employees.emp_no=dept_emp.emp_no)
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