How would you check if the ship status is either 'silver' or 'gold'?

To check if the ship status is either 'silver' or 'gold', you can use a membership test. In Python: if ship_status in ('silver', 'gold'): ... . In JavaScript: if (['silver', 'gold'].includes(shipStatus)) { ... }. In Java: if (shipStatus.equals("silver") || shipStatus.equals("gold")) { ... } or use a Set for cleaner code. This approach ensures that only the allowed statuses are accepted. If you need to enforce this rule at the database level, you can use a CHECK constraint: CHECK (ship_status IN ('silver', 'gold')). This prevents invalid values from being stored. If you want to provide user feedback, you can throw an exception or return an error message when the status is not valid.