Time And Relational Theory

Time and Relational Theory PDF
Author: C.J. Date
Publisher: Morgan Kaufmann
ISBN: 0128006757
Size: 69.77 MB
Format: PDF, Kindle
Category : Computers
Languages : en
Pages : 560
View: 3274

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Time and Relational Theory provides an in-depth description of temporal database systems, which provide special facilities for storing, querying, and updating historical and future data. Traditionally, database management systems provide little or no special support for temporal data at all. This situation is changing because: Cheap storage enables retention of large volumes of historical data in data warehouses Users are now faced with temporal data problems, and need solutions Temporal features have recently been incorporated into the SQL standard, and vendors have begun to add temporal support to their DBMS products Based on the groundbreaking text Temporal Data & the Relational Model (Morgan Kaufmann, 2002) and new research led by the authors, Time and Relational Theory is the only book to offer a complete overview of the functionality of a temporal DBMS. Expert authors Nikos Lorentzos, Hugh Darwen, and Chris Date describe an approach to temporal database management that is firmly rooted in classical relational theory and will stand the test of time. This book covers the SQL:2011 temporal extensions in depth and identifies and discusses the temporal functionality still missing from SQL. Understand how the relational model provides an ideal basis for taming the complexities of temporal databases Learn how to analyze and evaluate commercial temporal products with this timely and important information Be able to use sound principles in designing and using temporal databases Understand the temporal support recently added to SQL with coverage of the new SQL features in this unique, accurate, and authoritative reference Appreciate the benefits of a truly relational approach to the problem with this clear, user friendly presentation

Time And Relational Theory

Time and Relational Theory PDF
Author: C. J. Date
Publisher:
ISBN: 9781491917763
Size: 36.51 MB
Format: PDF, ePub, Docs
Category :
Languages : en
Pages :
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"This Master Class video describes and explains that theoretical ideal- which, interestingly, is 100 percent consistent with the classical relational model-in depth. It also discusses, in depth, the new temporal support to be found in the SQL standard. This video includes five major parts: A review of relational concepts, laying the foundations, building on the foundations, and SQL support."--Resource description page.

Sql And Relational Theory

SQL and Relational Theory PDF
Author: C.J. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 9780596555429
Size: 43.24 MB
Format: PDF
Category : Computers
Languages : en
Pages : 428
View: 7525

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Understanding SQL's underlying theory is the best way to guarantee that your SQL code is correct and your database schema is robust and maintainable. On the other hand, if you're not well versed in the theory, you can fall into several traps. In SQL and Relational Theory, author C.J. Date demonstrates how you can apply relational theory directly to your use of SQL. With numerous examples and clear explanations of the reasoning behind them, you'll learn how to deal with common SQL dilemmas, such as: Should database access granted be through views instead of base tables? Nulls in your database are causing you to get wrong answers. Why? What can you do about it? Could you write an SQL query to find employees who have never been in the same department for more than six months at a time? SQL supports "quantified comparisons," but they're better avoided. Why? How do you avoid them? Constraints are crucially important, but most SQL products don't support them properly. What can you do to resolve this situation? Database theory and practice have evolved since Edgar Codd originally defined the relational model back in 1969. Independent of any SQL products, SQL and Relational Theory draws on decades of research to present the most up-to-date treatment of the material available anywhere. Anyone with a modest to advanced background in SQL will benefit from the many insights in this book.

Sql And Relational Theory

SQL and Relational Theory PDF
Author: C. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449316409
Size: 23.95 MB
Format: PDF, ePub, Mobi
Category : Computers
Languages : en
Pages : 428
View: 1176

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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 the theory into practice. In this insightful book, author C.J. Date explains relational theory in depth, and demonstrates through numerous examples and exercises how you can apply it directly to your use of SQL. This second edition includes new material on recursive queries, “missing information” without nulls, new update operators, and topics such as aggregate operators, grouping and ungrouping, and view updating. If you have a modest-to-advanced background in SQL, you’ll learn how to deal with a host of common SQL dilemmas. Why is proper column naming so important? Nulls in your database are causing you to get wrong answers. Why? What can you do about it? Is it possible to write an SQL query to find employees who have never been in the same department for more than six months at a time? SQL supports “quantified comparisons,” but they’re better avoided. Why? How do you avoid them? Constraints are crucially important, but most SQL products don’t support them properly. What can you do to resolve this situation? Database theory and practice have evolved since the relational model was developed more than 40 years ago. SQL and Relational Theory draws on decades of research to present the most up-to-date treatment of SQL available. C.J. Date has a stature that is unique within the database industry. A prolific writer well known for the bestselling textbook An Introduction to Database Systems (Addison-Wesley), he has an exceptionally clear style when writing about complex principles and theory.

Database Design And Relational Theory

Database Design and Relational Theory PDF
Author: C.J. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449330207
Size: 65.56 MB
Format: PDF, Kindle
Category : Computers
Languages : en
Pages : 278
View: 5859

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What makes this book different from others on database design? Many resources on design practice do little to explain the underlying theory, and books on design theory are aimed primarily at theoreticians. In this book, renowned expert Chris Date bridges the gap by introducing design theory in ways practitioners can understand—drawing on lessons learned over four decades of experience to demonstrate why proper database design is so critical in the first place. Every chapter includes a set of exercises that show how to apply the theoretical ideas in practice, provide additional information, or ask you to prove some simple theoretical result. If you’re a database professional familiar with the relational model, and have more than a passing interest in database design, this book is for you. Questions this book answers include: Why is Heath’s Theorem so important? What is The Principle of Orthogonal Design? What makes some JDs reducible and others irreducible? Why does dependency preservation matter? Should data redundancy always be avoided? Can it be? Databases often stay in production for decades, and careful design is critical for avoiding subtle errors and processing problems over time. If they’re badly designed, the negative impacts can be incredibly widespread. This gentle introduction shows you how to use important theoretical results to create good database designs.

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: 61.53 MB
Format: PDF, Kindle
Category : Database management
Languages : en
Pages : 304
View: 5572

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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.

Relational Theory For Computer Professionals

Relational Theory for Computer Professionals PDF
Author: C.J. Date
Publisher: "O'Reilly Media, Inc."
ISBN: 1449369456
Size: 26.10 MB
Format: PDF, Docs
Category : Computers
Languages : en
Pages : 284
View: 6420

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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.

Logic And Relational Theory

Logic and Relational Theory PDF
Author: C. J. Date
Publisher: Technics Publications
ISBN: 1634628772
Size: 77.30 MB
Format: PDF, Docs
Category : Computers
Languages : en
Pages : 512
View: 3594

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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.

World Enough And Space Time

World Enough and Space Time PDF
Author: John Earman
Publisher: Bradford Books
ISBN: 9780262550215
Size: 52.93 MB
Format: PDF, Docs
Category : Science
Languages : en
Pages : 250
View: 1123

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Newton's Principia introduced conceptions of space and time that launched one of themost famous and sustained debates in the history of physics, a controversy that involves fundamentalconcerns in the foundations of physics, metaphysics, and scientific epistemology.This bookintroduces and clarifies the historical and philosophical development of the clash between Newton'sabsolute conception of space and Leibniz's relational one. It separates the issues and provides newperspectives on absolute relational accounts of motion and relational-substantival accounts of theontology of space time.Earman's sustained treatment and imaginative insights raise to a new levelthe debate on these important issues at the boundary of philosophy and physics. He surveys thehistory of the controversy from Newton to Einstein develops the mathematics and physics needed topose the issues in sharp form and provides a persuasive assessment of the philosophical problemsinvolved.Most importantly, Earman revitalizes the connection of the debate to contemporary science.He shows, for example, how concerns raised by Leibniz form the core of ongoing debate on thefoundations of general theory of relativity, moving the discussion into a new and vital arena andintroducing arguments that will be discussed for years to come.John Earman is Professor of Historyand Philosophy of Science at the University of Pittsburgh. A Bradford Book

Time And Temporality In Intercultural Perspective

Time and Temporality in Intercultural Perspective PDF
Author: Douwe Tiemersma
Publisher: Rodopi
ISBN: 9789051839739
Size: 50.11 MB
Format: PDF, Docs
Category : Philosophy
Languages : en
Pages : 188
View: 3014

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From the contents: The necessity of intercultural philosophy (Jan Hoogland).- Some reflections on Aristotle's notion of time in an intercultural perspective (Juergen Hengelbrock).- Time in Buddhism and Leibniz: an intercultural perspective (Hari Shankar Prasad).- Time and temporality from the Japanese perspective (Tomonaga Tairako).- Time and African thought (Kwasi Wiredu). (Barbara Arizti Martin).

Time Causality And The Quantum Theory

Time  Causality  and the Quantum Theory PDF
Author: S. Mehlberg
Publisher: Springer Science & Business Media
ISBN: 9400989881
Size: 64.83 MB
Format: PDF, Kindle
Category : Philosophy
Languages : en
Pages : 294
View: 7089

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History Memory And State Sponsored Violence

History  Memory  and State Sponsored Violence PDF
Author: Berber Bevernage
Publisher: Routledge
ISBN: 1136634444
Size: 54.65 MB
Format: PDF, ePub, Docs
Category : History
Languages : en
Pages : 250
View: 854

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Modern historiography embraces the notion that time is irreversible, implying that the past should be imagined as something ‘absent’ or ‘distant.’ Victims of historical injustice, however, in contrast, often claim that the past got ‘stuck’ in the present and that it retains a haunting presence. History, Memory, and State-Sponsored Violence is centered around the provocative thesis that the way one deals with historical injustice and the ethics of history is strongly dependent on the way one conceives of historical time; that the concept of time traditionally used by historians is structurally more compatible with the perpetrators’ than the victims’ point of view. Demonstrating that the claim of victims about the continuing presence of the past should be taken seriously, instead of being treated as merely metaphorical, Berber Bevernage argues that a genuine understanding of the ‘irrevocable’ past demands a radical break with modern historical discourse and the concept of time. By embedding a profound philosophical reflection on the themes of historical time and historical discourse in a concrete series of case studies, this project transcends the traditional divide between ‘empirical’ historiography on the one hand and the so called ‘theoretical’ approaches to history on the other. It also breaks with the conventional ‘analytical’ philosophy of history that has been dominant during the last decades, raising a series of long-neglected ‘big questions’ about the historical condition – questions about historical time, the unity of history, and the ontological status of present and past –programmatically pleading for a new historical ethics.

Cartesian Spacetime

Cartesian Spacetime PDF
Author: E. Slowik
Publisher: Springer Science & Business Media
ISBN: 9401709750
Size: 66.91 MB
Format: PDF, ePub, Mobi
Category : Philosophy
Languages : en
Pages : 252
View: 3390

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Although Descartes' natural philosophy marked an advance in the development of modern science, many critics over the years, such as Newton, have rejected his particular `relational' theory of space and motion. Nevertheless, it is also true that most historians and philosophers have not sufficiently investigated the viability of the Cartesian theory. This book explores, consequently, the success of the arguments against Descartes' theory of space and motion by determining if it is possible to formulate a version that can eliminate its alleged problems. In essence, this book comprises the first sustained attempt to construct a consistent `Cartesian' spacetime theory: that is, a theory of space and time that consistently incorporates Descartes' various physical and metaphysical concepts. Intended for students in the history of philosophy and science, this study reveals the sophisticated insights, and often quite successful elements, in Descartes' unjustly neglected relational theory of space and motion.

The Importance Of Time

The Importance of Time PDF
Author: Philosophy of Time Society
Publisher: Springer Science & Business Media
ISBN: 9781402000621
Size: 61.20 MB
Format: PDF, ePub, Docs
Category : Philosophy
Languages : en
Pages : 295
View: 2027

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The Importance of Time is a unique work that reveals the central role of the philosophy of time in major areas of philosophy. The first part of the book consists of symposia on two of the most important works in the philosophy of time over the past decade: Michael Tooley's Time, Tense, and Causation and D.H. Mellor's Real Time II. What characterizes these essays, and those that follow, are the interchanges between original papers, with original responses to them by commentators. The wide range of interrelated topics covered in this book is one of its most distinctive features. The book is divided into six parts: I. Book Symposia, II. Temporal Becoming, III. The Phenomenology of Time, IV. God, Time and Foreknowledge, V. Time and Physical Objects, and VI. Time and Causation, and contains 24 essays by leading philosophers in the various areas: Laurie Paul, Quentin Smith, L. Nathan Oaklander, Hugh Mellor, John Perry, William Lane Craig, Brian Leftow, Ned Markosian, Ronald C. Hoy, Michael Tooley, Storrs McCall, David Hunt, Mark Hinchliff, Robin Le Poidevin, Iain Martel and Eric M. Rubenstein.