What criterion for the courier number field that allows the user to enter a different courier each time the query is run?

To allow the user to enter a different courier each time the query is run, the criterion for the courier number field should be set to a parameter prompt. This can be achieved by using a placeholder, such as ? or a specific parameter name (e.g., @CourierNumber), depending on the database or query language being used. This approach enables the query to accept user input at runtime, ensuring flexibility in selecting different couriers for each execution.