Well, a data warehouse is one thing. I have heard of them just having a single live database that everyone hits. For all uses. Edit: in contrast, I don't wan

Well, a data warehouse is one thing. I have heard of them just having a single live database that everyone hits. For all uses. Edit: in contrast, I don't want anything about a user, except their id in a table for most features. Hearing of free for all's on data makes me question how they protect payment or just general private data.