How can I use `THROW` to simulate a specific SQL Server error for testing purposes?

You can use `THROW` with a known system error number to simulate that error. For example, to simulate a common constraint violation error, you might use `THROW 2627, 'Violation of PRIMARY KEY constraint ''PK_MyTable''. Cannot insert duplicate key in object ''MyTable''.', 1;`. However, be cautious when re-throwing system errors as it can lead to unexpected behavior if not handled correctly.