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Database in Depth
Relational Theory for Practitioners
- By
- C. J. Date
- Publisher:
- O'Reilly Media
- Released:
- May 2005
- Pages:
- 240
This concise guide sheds light on the principles behind the relational model, which underlies all database products in wide use today. It goes beyond the hype to give you a clear view of the technology--a view that's not influenced by any vendor or product. Ideal for experienced database developers and designers.
This book sheds light on the principles behind the relational model, which is fundamental to all database-backed applications--and, consequently, most of the work that goes on in the computing world today. Database in Depth: The Relational Model for Practitioners goes beyond the hype and gets to the heart of how relational databases actually work.
Ideal for experienced database developers and designers, this concise guide gives you a clear view of the technology--a view that's not influenced by any vendor or product. Featuring an extensive set of exercises, it will help you:
- understand why and how the relational model is still directly relevant to modern database technology (and will remain so for the foreseeable future)
- see why and how the SQL standard is seriously deficient
- use the best current theoretical knowledge in the design of their databases and database applications
- make informed decisions in their daily database professional activities
Author C.J. Date has been involved with the relational model from its earliest days. An exceptionally clear-thinking writer, Date lays out principle and theory in a manner that is easily understood. Few others can speak as authoritatively the topic of relational databases as Date can.
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Chapter One Introduction
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A Remark on Terminology
-
Principles, Not Products
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A Review of the Original Model
-
Model Versus Implementation
-
Properties of Relations
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Relations Versus Relvars
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Values Versus Variables
-
Summary
-
Exercises
-
-
Chapter Two Relations Versus Types
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Domain-Constrained Comparisons
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Data Value Atomicity
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So What's a Type?
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Scalar Versus Nonscalar Types
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Summary
-
Exercises
-
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Chapter Three Tuples and Relations
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What's a Tuple?
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Some Important Consequences
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What's a Relation?
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Further Important Consequences
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Why Duplicate Tuples Are Prohibited
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Why Nulls Are Prohibited
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TABLE_DUM and TABLE_DEE
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Summary
-
Exercises
-
-
Chapter Four Relation Variables
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Updating Is Set-at-a-Time
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More on Candidate Keys
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More on Foreign Keys
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More on Views
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Relvars and Predicates
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More on Relations Versus Types
-
Summary
-
Exercises
-
-
Chapter Five Relational Algebra
-
More on Closure
-
The Original Operators
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Evaluating SQL Expressions
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Extend and Summarize
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Group and Ungroup
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Expression Transformation
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Relational Comparisons
-
More on Relational Assignment
-
The ORDER BY Operator
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Summary
-
Exercises
-
-
Chapter Six Integrity Constraints
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Type Constraints
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Database Constraints
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Transactions
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Why Database Constraint Checking Must Be Immediate
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But Doesn't Some Checking Have to Be Deferred?
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Constraints and Predicates
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Miscellaneous Issues
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Summary
-
Exercises
-
-
Chapter Seven Database Design Theory
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The Place of Design Theory
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Functional Dependencies and Boyce/Codd Normal Form
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Join Dependencies and Fifth Normal Form
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Two Cheers for Normalization
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Orthogonality
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Some Remarks on Physical Design
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Summary
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Exercises
-
-
Chapter Eight What Is the Relational Model?
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The Relational Model Defined
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Objectives of the Relational Model
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Some Database Principles
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The Relational Model Versus Others
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What Remains to Be Done?
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Summary
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Exercises
-
-
Appendix A A Little Bit of Logic
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Propositions
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Predicates
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Quantification
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Free and Bound Variables
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More on Quantification
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Database Constraints
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Queries
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Some Equivalences
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Summary
-
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Appendix Suggestions for Further Reading
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Colophon

- Title:
- Database in Depth
- By:
- C. J. Date
- Publisher:
- O'Reilly Media
- Formats:
-
- Ebook
- Safari Books Online
- Print Release:
- May 2005
- Ebook Release:
- June 2009
- Pages:
- 240
- Print ISBN:
- 978-0-596-10012-4
- | ISBN 10:
- 0-596-10012-4
- Ebook ISBN:
- 978-0-596-10536-5
- | ISBN 10:
- 0-596-10536-3
C. J. Date is an independent author, lecturer, researcher, and consultant specializing in relational database systems. He was one of the first persons anywhere to recognize the fundamental importance of Codd's pioneering work on the relational model. He was also involved in technical planning for the IBM products SQL/DS and DB2 at the IBM Santa Teresa Laboratory in San Jose, California. He is best known for his books, in particular An Introduction to Database Systems, Eighth Edition (Addison-Wesley, 2004), the standard text in the field, which has sold nearly three quarters of a million copies worldwide, and (with Hugh Darwen and Nikos A. Lorentzos) Temporal Data and the Relational Model (Morgan Kaufmann, 2003). He enjoys a reputation that is second to none for his ability to explain complex technical material in a clear and understandable fashion.
Our look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects.
Genevieve d'Entremont was the production editor and copyeditor for Database in Depth. Matt Hutchinson proofread the book. Adam Witwer and Colleen Gorman provided quality control. Lydia Onofrei provided production assistance. Reg Aubry wrote the index.
Michele Wetherbee is the creative director for the Theory in Practice book series. MendeDesign designed the cover of this book. Karen Montgomery produced the cover layout with Adobe InDesign CS using the Akzidenz Grotesk and Orator fonts.
Marcia Friedman designed the interior layout. Melanie Wang designed the template. This book was converted by Keith Fahlgren and Andrew Savakis to FrameMaker 5.5.6 with a format conversion tool created by Erik Ray, Jason McIntosh, Neil Walls, and Mike Sierra that uses Perl and XML technologies. The text font is Adobe's Meridien; the heading font is ITC Bailey; and the code font is LucasFont's TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano, Jessamyn Read, and Lesley Borash using Macromedia FreeHand MX and Adobe Photoshop CS.
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