SELECT employee_id FROM Employees EXCEPT SELECT Destroyed_by_Employee_ID FROM Documents_to_be_destroyed
Show the ids of all employees who don't destroy any document.
SELECT employee_id FROM Employees EXCEPT SELECT Destroyed_by_Employee_ID FROM Documents_to_be_destroyed
select employee_id from employees except select destroyed_by_employee_id from documents_to_be_destroyed
Show the ids of all employees who do n't destroy any document .