Relational Theory For Computer Professionals

Relational Theory for Computer Professionals PDF
Author: C.J. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449369464
Size: 13.84 MB
Format: PDF, ePub
Category : Computers
Languages : en
Pages : 284
View: 5225

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All of today’s mainstream database products support the SQL language, and relational theory is what SQL is supposed to be based on. But are those products truly relational? Sadly, the answer is no. This book shows you what a real relational product would be like, and how and why it would be so much better than what’s currently available. With this unique book, you will: Learn how to see database systems as programming systems Get a careful, precise, and detailed definition of the relational model Explore a detailed analysis of SQL from a relational point of view There are literally hundreds of books on relational theory or the SQL language or both. But this one is different. First, nobody is more qualified than Chris Date to write such a book. He and Ted Codd, inventor of the relational model, were colleagues for many years, and Chris’s involvement with the technology goes back to the time of Codd’s first papers in 1969 and 1970. Second, most books try to use SQL as a vehicle for teaching relational theory, but this book deliberately takes the opposite approach. Its primary aim is to teach relational theory as such. Then it uses that theory as a vehicle for teaching SQL, showing in particular how that theory can help with the practical problem of using SQL correctly and productively. Any computer professional who wants to understand what relational systems are all about can benefit from this book. No prior knowledge of databases is assumed.

Database In Depth

Database in Depth PDF
Author: C.J. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449342647
Size: 60.80 MB
Format: PDF, Docs
Category : Computers
Languages : en
Pages : 232
View: 5893

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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.

E F Codd And Relational Theory A Detailed Review And Analysis Of Codd S Major Database Writings

E  F  Codd and Relational Theory  A Detailed Review and Analysis of Codd  s Major Database Writings PDF
Author: C. J. Date
Publisher: Lulu.com
ISBN: 1684705274
Size: 40.32 MB
Format: PDF, Mobi
Category : Database management
Languages : en
Pages : 304
View: 4600

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E. F. Codd's relational model of data has been described as one of the three greatest inventions of all time (the other two being agriculture and the scientific method), and his receipt of the 1981 ACM Turing Award?the top award in computer science?for inventing it was thoroughly deserved. The papers in which Codd first described his model were staggering in their originality; they had, and continue to have, a huge impact on just about every aspect of the way we do business in the world today. And yet few people, even in the professional database community, are truly familiar with those papers. This book is an attempt to remedy this sorry state of affairs. In it, well known author C. J. Date provides a detailed examination of all of Codd's major technical publications, explaining the nature of his contribution in depth, and in particular highlighting not only the many things he got right but also some of the things he got wrong.

Sql And Relational Theory

SQL and Relational Theory PDF
Author: C.J. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1491941154
Size: 28.55 MB
Format: PDF, Docs
Category : Computers
Languages : en
Pages : 582
View: 2887

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SQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put that theory into practice. In this book, Chris Date explains relational theory in depth, and demonstrates through numerous examples and exercises how you can apply it to your use of SQL. This third edition has been revised, extended, and improved throughout. Topics whose treatment has been expanded include data types and domains, table comparisons, image relations, aggregate operators and summarization, view updating, and subqueries. A special feature of this edition is a new appendix on NoSQL and relational theory. Could you write an SQL query to find employees who have worked at least once in every programming department in the company? And be sure it’s correct? Why is proper column naming so important? Nulls in the database cause wrong answers. Why? What you can do about it? How can image relations help you formulate complex SQL queries? SQL supports "quantified comparisons," but they’re better avoided. Why? And how? Database theory and practice have evolved considerably since Codd first defined the relational model, back in 1969. This book draws on decades of experience to present the most up to date treatment of the material available anywhere. Anyone with a modest to advanced background in SQL can benefit from the insights it contains. The book is product independent.

Database Design And Relational Theory

Database Design and Relational Theory PDF
Author: C. J. Date
Publisher: Apress
ISBN: 1484255402
Size: 12.56 MB
Format: PDF, ePub, Mobi
Category : Computers
Languages : en
Pages : 451
View: 2174

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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.

Database Design And Relational Theory

Database Design and Relational Theory PDF
Author: Chris Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449328016
Size: 36.65 MB
Format: PDF, Kindle
Category : Computers
Languages : en
Pages : 260
View: 3133

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Because databases often stay in production for decades, careful design is critical to making the database serve the needs of your users over years, and to avoid subtle errors or performance problems. In this book, C.J. Date, a leading exponent of relational databases, lays out the principles of good database design.

View Updating And Relational Theory

View Updating and Relational Theory PDF
Author: Chris Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449357849
Size: 27.71 MB
Format: PDF, ePub
Category : Computers
Languages : en
Pages : 240
View: 5393

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Views are virtual tables. That means they should be updatable, just as "real" or base tables are. In fact, view updatability isn’t just desirable, it’s crucial, for practical reasons as well as theoretical ones. But view updating has always been a controversial topic. Ever since the relational model first appeared, there has been widespread skepticism as to whether (in general) view updating is even possible. In stark contrast to this conventional wisdom, this book shows how views, just like base tables, can always be updated (so long as the updates don’t violate any integrity constraints). More generally, it shows how updating always ought to work, regardless of whether the target is a base table or a view. The proposed scheme is 100% consistent with the relational model, but rather different from the way updating works in SQL products today. This book can: Help database products improve in the future Help with a "roll your own" implementation, absent such product improvements Make you aware of the crucial role of predicates and constraints Show you how relational products are really supposed to behave Anyone with a professional interest in the relational model, relational technology, or database systems in general can benefit from this book.

Oracle Essentials

Oracle Essentials PDF
Author: Rick Greenwald
Publisher: "O'Reilly Media, Inc."
ISBN: 1449343171
Size: 32.29 MB
Format: PDF, Mobi
Category : Computers
Languages : en
Pages : 432
View: 3316

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Written by Oracle insiders, this indispensable guide distills an enormous amount of information about the Oracle Database into one compact volume. Ideal for novice and experienced DBAs, developers, managers, and users, Oracle Essentials walks you through technologies and features in Oracle’s product line, including its architecture, data structures, networking, concurrency, and tuning. Complete with illustrations and helpful hints, this fifth edition provides a valuable one-stop overview of Oracle Database 12c, including an introduction to Oracle and cloud computing. Oracle Essentials provides the conceptual background you need to understand how Oracle truly works. Topics include: A complete overview of Oracle databases and data stores, and Fusion Middleware products and features Core concepts and structures in Oracle’s architecture, including pluggable databases Oracle objects and the various datatypes Oracle supports System and database management, including Oracle Enterprise Manager 12c Security options, basic auditing capabilities, and options for meeting compliance needs Performance characteristics of disk, memory, and CPU tuning Basic principles of multiuser concurrency Oracle’s online transaction processing (OLTP) Data warehouses, Big Data, and Oracle’s business intelligence tools Backup and recovery, and high availability and failover solutions

Logic And Relational Theory

Logic and Relational Theory PDF
Author: C. J. Date
Publisher: Technics Publications
ISBN: 1634628772
Size: 29.47 MB
Format: PDF, Kindle
Category : Computers
Languages : en
Pages : 512
View: 3236

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This book is a revised, upgraded, and hugely improved version of an earlier one called Logic and Databases. Although it’s effectively a brand new book, therefore, the following remarks from that earlier book are still relevant here. First, logic and databases are inextricably intertwined. The relational model itself is essentially just elementary logic, tailored to database needs. Now, if you’re a database professional, this won’t be news to you—but you still might not realize just how much everything we do in the database world is (or should be!) affected by logic. Logic is fundamental, and everywhere. As a database professional, therefore, you owe it to yourself to understand the basics of formal logic, and you ought to be able to explain (and perhaps defend) the connections between formal logic and database technology. And that’s what this book is about. What it does is show, through a series of partly independent, partly interrelated essays, just how various crucial aspects of database technology—some of them very familiar, others maybe less so—are solidly grounded in formal logic. Overall, the goal is to help you realize the importance of logic in everything you do, and also, I hope, to help you see that logic can be fun.

Logic And Databases

Logic and Databases PDF
Author: C. J. Date
Publisher: Trafford Publishing
ISBN: 1425122906
Size: 17.45 MB
Format: PDF
Category : Computers
Languages : en
Pages : 445
View: 6247

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Databases are based on logic - right? Everybody knows that. Or do they? Chris Date's most recent book explores the myriad ways in which logic affects the database world.

The Relational Database Dictionary Extended Edition

The Relational Database Dictionary  Extended Edition PDF
Author: Christopher Date
Publisher: Apress
ISBN: 1430210427
Size: 50.37 MB
Format: PDF, Docs
Category : Computers
Languages : en
Pages : 200
View: 4248

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Chris Date, one of the founders of the relational model, has updated and expanded his relational database dictionary to include more than 900 terms.

The Relational Database Dictionary Extended Edition

The Relational Database Dictionary  Extended Edition PDF
Author: C. J. Date
Publisher: Springer
ISBN: 1430210419
Size: 12.76 MB
Format: PDF, ePub, Mobi
Category : Computers
Languages : en
Pages : 215
View: 7734

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Chris Date, one of the founders of the relational model, has updated and expanded his relational database dictionary to include more than 900 terms. What you’ll learn Over 900 relational database terms defined Precise and concise definitions, unlike those found on Wikipedia and other sources Clear examples used where appropriate Hyperlinks included in the eBook for easy reference Who this book is for People who need to know something about databases, although it is not their main line of work; people new to databases, and non computer people looking to be conversant in database.

Applied Mathematics For Database Professionals

Applied Mathematics for Database Professionals PDF
Author: Lex deHaan
Publisher: Apress
ISBN: 9781430203483
Size: 39.35 MB
Format: PDF, Docs
Category : Computers
Languages : en
Pages : 379
View: 3263

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This book touches on an area seldom explored: the mathematical underpinnings of the relational database. The topic is important, but far too often ignored. This is the first book to explain the underlying math in a way that’s accessible to database professionals. Just as importantly, if not more so, this book goes beyond the abstract by showing readers how to apply that math in ways that will make them more productive in their jobs. What’s in this book will "open the eyes" of most readers to the great power, elegance, and simplicity inherent in relational database technology.

Date On Database

Date on Database PDF
Author: Christopher Date
Publisher: Apress
ISBN: 9781430203490
Size: 20.32 MB
Format: PDF, Mobi
Category : Computers
Languages : en
Pages : 546
View: 3826

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C. J. Date is one of the founding fathers of the relational database field. Many of today’s seasoned database professionals "grew up" on Date’s writings. Those same professionals, along with other serious database students and practitioners, form the core audience for Date’s ongoing writing efforts. Date on Database: Writings 2000-2006 is a compilation of Date’s most significant articles and papers over the past seven years. It gives readers a one-stop place in which to find Date’s latest thinking on relational technology. Many papers are not easily found outside this book.