No preference or requirements to answer for a particular database platform. Question may request a generic answer that covers multiple databases.
Per the question on allowing database-agnostic how to questions, a question that can be answered differently depending on the database platform should be asked in separate questions, one for each database platform. This allows for a single correct answer. Sometimes the person asking may not realize that a question has different answers for different platforms. In these cases the question may need to be split or a platform tag added and the database-agnostic tag removed.