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The Relational Database ...
A comprehensive glossary of relational terms and concepts, with illustrative examples
by C. J.
The Relational Database Dictionary by C. J. Date Copyright © 2006 C. J. Date. All rights reserved. Printed in the United States of America. Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472. O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles (safari.oreilly.com). For more information, contact our corporate/ institutional sales department: (800) 998-9938 or corporate@oreilly.com. Editor: Deborah Russell Cover Designer: Karen Montgomery Production Editor: Interior Designer: David Futato Rachel Monaghan Illustrators: Robert Romano and Proofreader: Rachel Monaghan Jessamyn Read Printing History: August 2006: First Edition. Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly Media, Inc. The Pocket Reference series designations, The Relational Database Dictionary, the image of newts, and related trade dress are trademarks of O’Reilly Media, Inc. Many of the designations used by manufacturers and sellers to
(2006)
SQL and Relational Theory
How to Write Accurate SQL Code
by C. J.
Other resources from O’Reilly Related titles The Art of SQL Essential SQLAlchemy Database In Depth SQL in a Nutshell oreilly.com oreilly.com is more than a complete catalog of O’Reilly books. You’ll also find links to news, events, articles, weblogs, sample chapters, and code examples. oreillynet.com is the essential portal for developers interested in open and emerging technologies, including new plat- forms, programming languages, and operating systems. Conferences O’Reilly brings diverse innovators together to nurture the ideas that spark revolutionary industries. We specialize in documenting the latest tools and systems, translating the innovator’s knowledge into useful skills for those in the trenches. Visit conferences.oreilly.com for our upcoming events. Safari Bookshelf (safari.oreilly.com) is the premier online reference library for programmers and IT professionals. Conduct searches across more than 1,000 books. Sub- scribers can zero in on answers to time-critical questions in a matter of seconds. Read the books on your Bookshelf from
(2009)
Database in Depth
Relational Theory for Practitioners
by C. J.
Chapter 1 CHAPTER ONE CHAPTER 1 Introduction Professionals in any discipline need to know the foundations of their field. So if you’re a database professional, you need to know the relational model, because that model is the foundation (or a huge part of the foundation, anyway) of the database field in particular. Now, every course in database management, be it academic or commercial, does at least pay lip service to the idea of teaching the relational model—but most of that teaching seems to be done very badly, if results are anything to go by. The relational model cer- tainly isn’t very well or very widely understood in the database community at large. Here are some possible reasons for this state of affairs: • The model is taught in a vacuum. That is, for beginners at least, it’s hard to see the relevance of the material, or it’s hard to understand
(2007)
