Database design

quote from Crafsman

“One of the worst ways to design a system is to think of the database first. I know; believe me, I know. What we want to do is push off decisions about the database for as long as possible. Eventually, we’ll figure out how to ensure the suits are stored on disk, but I don’t know whether we’ll use a real database (whatever that is) or not. Perhaps we’ll just take all the data in RAM and periodically write it to flat files? I just don’t know right now, and I don’t want to know. We’ll work out those details as we go along.”

Great thought