Then you should probably rewrite your statements anyways to take advantage of platform-specific features. I won't write a query on MySQL the same as I would on

Then you should probably rewrite your statements anyways to take advantage of platform-specific features. I won't write a query on MySQL the same as I would on Postgres, because there's usually a better way. CRUD is about all that can honestly stay the same, as IMO that's where ORMs shine.