SELECT employee_id FROM Employees EXCEPT SELECT Destruction_Authorised_by_Employee_ID FROM Documents_to_be_destroyed
Show the ids of the employees who don't authorize destruction for any document.
SELECT employee_id FROM Employees EXCEPT SELECT Destruction_Authorised_by_Employee_ID FROM Documents_to_be_destroyed
select employee_id from employees except select destruction_authorised_by_employee_id from documents_to_be_destroyed
Show the ids of the employees who do n't authorize destruction for any document .