sqlite DB to-do during iphone app update

Question

I have some general questions about iphone app updates that involves sqlite db.

1. With the new update does the existing sqlite db get overwritten with a copy

Answer 1

What I do is that I create a working copy of the database in the Documents directory. The main copy comes with the bundle. When I update the app I then have the option to make a new copy over the working copy, or leave it.