liquid base (or something like it) and a bit of forthought is the answer. Change your databse an order of magnitude slower than your higher level code bases. I

liquid base (or something like it) and a bit of forthought is the answer. Change your databse an order of magnitude slower than your higher level code bases. I do think the trend to nosql and document oriented db's was a results of people seeing just the sorts of messes you can get into with things like Oracle and Pg with stuff over the longer term.