Web Pathway: Web Applications

Recently in the Web Apps series of lectures we have been looking at databases and the ability to query them. I found these very simple to start off with, studying Computing at A-Level I've created more then enough database. This, is slightly different, even if maybe for the same purpose. I'm struggling slightly on the queries and the slightest of things that would make the database incomplete.
Hopefully this will be rectified soon before I need to implement it any further.