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Database Design and Relational Theory

Normal Forms and All That Jazz

C. J. Date

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APress
16 December 2019
Create database designs that scale, meet business requirements, and inherently work toward keeping your data structured and usable in the face of changing business models and software systems. This book is about database design theory. Design theory is the scientific foundation for database design, just as the relational model is the scientific foundation for database technology in general. Databases lie at the heart of so much of what we do in the computing world that negative impacts of poor design can be extraordinarily widespread.

This second edition includes greatly expanded coverage of exotic and little understood normal forms such as: essential tuple normal form (ETNF), redundancy free normal form (RFNF), superkey normal form (SKNF), sixth normal form (6NF), and domain key normal form (DKNF). Also included are new appendixes, including one that provides an in-depth look into the crucial notion of data consistency. Sequencing of topics has been improved, and many explanations and examples have been rewritten and clarified based upon the author's teaching of the content in instructor-led courses. This book aims to be different from other books on design by bridging the gap between the theory of design and the practice of design. The book explains theory in a way that practitioners should be able to understand, and it explains why that theory is of considerable practical importance. Reading this book provides you with an important theoretical grounding on which to do the practical work of database design. Reading the book also helps you in going to and understanding the more academic texts as you build your base of knowledge and expertise. Anyone with a professional interest in database design can benefit from using this book as a stepping-stone toward a more rigorous design approach and more lasting database models.

What You Will Learn Understand what design theory is and is not Be aware of the two different goals of normalization Know which normal forms are truly significant Apply design theory in practice Be familiar with techniques for dealing with redundancy Understand what consistency is and why it is crucially important Who This Book Is For Those having a professional interest in database design, including data and database administrators; educators and students specializing in database matters; information modelers and database designers; DBMS designers, implementers, and other database vendor personnel; and database consultants. The book is product independent.
By:   C. J. Date
Imprint:   APress
Country of Publication:   United States
Edition:   2nd ed.
Dimensions:   Height: 254mm,  Width: 178mm, 
Weight:   891g
ISBN:   9781484255391
ISBN 10:   1484255399
Pages:   451
Publication Date:   16 December 2019
Audience:   Professional and scholarly ,  Undergraduate
Format:   Paperback
Publisher's Status:   Active
Part I. Setting the Scene Chapter 1. PreliminariesChapter 2. Prerequisites Part II. Functional Dependencies, Boyce/CODD Normal Form, and Related MattersChapter 3. Normalization: Some GeneralitiesChapter 4. FDs and BCNF (Informal)Chapter 5. FDs and BCNF (Formal)Chapter 6. Preserving FDsChapter 7. FD AxiomatizationChapter 8. Denormalization Part III. Join Dependencies, Fifth Normal Form, and Related MattersChapter 9. JDs and 5NF (Informal)Chapter 10. JDs and 5NF (Formal)Chapter 11. Implicit DependenciesChapter 12. MVDs and 4NF Part IV. Further Normal FormsChapter 13. ETNF, RFNF, SKNFChapter 14. 6NFChapter 15. The End Is Not Yet Part V. OrthogonalityChapter 16. The Principle of Orthogonal Design Part VI. RedundancyChapter 17. We Need More Science Part VII. AppendixesChapter 18: Appendix A. What Is Database Design, Anyway?Chapter 19: Appendix B. More on ConsistencyChapter 20: Appendix C. Primary Keys Are Nice but Not EssentialChapter 21: Appendix D. Historical Notes

CJ Date is an independent author, lecturer, researcher, and consultant, specializing in relational database technology, a field he helped pioneer. Prior to leaving IBM in 1983, he was involved in technical planning and externals design for the IBM products SQL/DS and DB2. His book An Introduction to Database Systems (8th edition) is the standard text on the subject and has sold 900,000 copies, not counting translations. It is used by several hundred colleges and universities worldwide. Mr. Date has delivered live lectures and seminars on database matters at locations throughout the world. He holds an honors degree in mathematics from Cambridge University and has made a number of original contributions to database theory. He enjoys a reputation that is second to none for his ability to explain complex technical issues in a clear and understandable fashion.

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