> For one thing, it's very difficult to query the individual fields within that JSON data. You also can't retrieve a portion of the data, or do atomic updates t

> For one thing, it's very difficult to query the individual fields within that JSON data. You also can't retrieve a portion of the data, or do atomic updates to individual fields I think this may be possible to some degree using the scripting capabilites of the RDBMS, but I don't know for sure. Even then, I have to agree that in Mongo it is much easier to do because it's built-in. > when you have to run an alter statement on your huge SQL dataset that takes down your site for hours. That's indeed a problem. I wonder if there's a SQL database that allows instant schema changes; I can't see a reason why it shouldn't be possible technically.