Only use this tag when the question does not depend on a particular database management system.
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 management system (DBMS) should be asked in separate questions, one for each DBMS. This allows for a single correct answer. Sometimes the person asking may not realize that a question has different answers for different DBMSs. In these cases the question may need to be split or a DBMS-specific tag added and the
database-agnostic tag removed.