http://www.agiledata.org/essays/dataModeling101.html http://www.databaseanswers.org/modelling_books.htm FYI,good luck
Let me throw in one more that I believe is quite good for a start: http://www.amazon.com/Database-Design-Mere-Mortals-Hands/dp/0201694719
i suggest: Data Modeling Essentials, Third Edition http://www.amazon.com/Modeling-Essentials-Third-Graeme-Simsion/dp/0126445516/ref=sr_1_9?ie=UTF8&s=books&qid=1268084628&sr=1-9