It's a pleasure to acknowledge my debt to the many people involved, directly or indirectly, in the production of this book. In particular, I'd like to mention my reviewers Stephane Faroult, Jonathan Gennick, Lex de Haan, Anthony Molinaro, Peter Robson, and Michael Wener for their helpful comments on earlier drafts of the manuscript. I'd also like to thank Nagraj Alur and Hugh Darwen for various technical discussions. Next, I'd like to thank my wife Lindy (as always) for her support throughout this and all of my other database projects over the years. Finally, I'm grateful to everyone at O'Reilly especially Jonathan Gennick and Genevieve d'Entremont for their encouragement, contributions, and support throughout the production of this book.
C. J. Date, Healdsburg, California, 2005