The book by Michael J. Hernandez Database Design for Mere Mortals is well written, and an easy read. It should answer all of your questions.
Hernandez also co-authored SQL Queries for Mere Mortals with John L. Viescas.
The books are about $60 a piece. I'm trying to find the CD for Queries for Mere Mortals because I lost mine. If anyone has a copy, let me know.
