Database in Depth: Relational Theory for Practitioners [NOOK Book]

Overview

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 ...

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Database in Depth: Relational Theory for Practitioners

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Overview

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
Database in Depth will appeal not only to database developers and designers, but also to a diverse field of professionals and academics, including database administrators (DBAs), information modelers, database consultants, and more. Virtually everyone who deals with relational databases should have at least a passing understanding of the fundamentals of working with relational models.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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Product Details

  • ISBN-13: 9781449342647
  • Publisher: O'Reilly Media, Incorporated
  • Publication date: 5/5/2005
  • Sold by: Barnes & Noble
  • Format: eBook
  • Edition number: 1
  • Pages: 232
  • Sales rank: 1,336,102
  • File size: 3 MB

Meet the Author

C. J. Date has a stature that is unique within the database industry. He is an independent author, lecturer, researcher, and consultant, specializing in relational database technology (a field he helped pioneer). He is best known for his books, especially his best-selling textbook An Introduction to Database Systems (8th edition published in 2004), which has sold nearly three quarters of a million copies and is used by several hundred colleges and universities worldwide.

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Table of Contents

1 Introduction 1
2 Relations versus types 23
3 Tuples and relations 41
4 Relation variables 61
5 Relational algebra 81
6 Integrity constraints 115
7 Database design theory 135
8 What is the relational model? 163
A A little bit of logic 181
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  • Anonymous

    Posted May 20, 2005

    shows limitations of SQL implementations

    Hmm. Didn't look like an O'Reilly book, at first glance. No 19th century style woodcut on the cover. Seriously, though, Date presents what you might call a 'clarification' of a relational database usage. He takes issue with current SQL implementations. But to gain from this book, you need proficiency in SQL and some understanding of relational databases. Not for the tyro. If you also hail from a pure maths background, that will aid in understanding. He revisits the basic concepts of relational databases; injecting considerable rigour into defining these. Perhaps most importantly, he shows why nulls are very bad in a table. Relational theory is built on Boolean logic, but nulls force a ternary logic that can screw everything up. And duplicate tuples (rows) are almost as bad. The fact that all current SQL implementations routinely permit nulls and duplicates shows their limitations. Rather unsettling, if you thought that db2 or Oracle were the last words in this field.

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