Rating: 

database I have used so far. Of all the PostgreSQL I own (at last count that was 5), the O'reilly book "Pratical prostgreSQL" is the one I refer to

most often. I use this book almost every day and cannot tell you how often this

book has helped. The examples given are usually bang on to the specific needs that I encountered.

My only concern with the book is that it doesn't cover PHP, which seems to be a natural fit for the best and most reliable open source database.