title: How can i view how differ my database from old versions of it?
body: <p>I have different versions of a database. With sql revisions, this database changes on every update. So, i want to follow this changes easily, because my database remarkably big. We'll always be giving some revisions to clients, and actually i have to protect my database model, need to view what actually i did in past on that database. So, is there any way to update my database with some changes, and then compare it with not-updated versions? 
  May i have this kind of model?</p>