Relational databases provide the ability to add, delete, modify, and query local data.

corresponds to the interface where data is inserted, and returns the line number of the latest inserted data when the insertion is successful, and 0 when it fails.

For interfaces that update data, the return value indicates the number of rows affected by the update operation, and returns 0 if the update fails.

For interfaces that delete data, the return value indicates the number of deleted data rows, and if the deletion fails, it returns 0.

For APIs that query data, you cannot run native SQL statements for query operations