How does that work? If you need to preserve data between the application versions then you still get all the headaches with MongoDb (either migrating the data

How does that work? If you need to preserve data between the application versions then you still get all the headaches with MongoDb (either migrating the data or supporting multiple schema versions when you read the data, oh the fun!). If you don't need to preserve data between the versions then you don't need to write migrations scripts in SQL, just scrape everything and pretend it's the first version of application.