SELECT employee$\_$id FROM employees MINUS

SELECT employee$\_$id FROM former$\_$employees

ORDER BY employee$\_$id;

$$ Retrieves employee IDs from 'employees' table that do not exist in 'former$\_$employees' table and sorts them in ascending order.

Retrieves employee IDs from

$$ 'former$\_$employees' table that do not exist in 'employees' table and sorts them in ascending order.

$$ Retrieves all employee IDs from the 'employees' table and sorts them in ascending order.

Retrieves employee IDs that exist in both 'employees' and 'former$\_$employees' tables