Dependencies in Relational Databases PDF Download

Author:
Publisher: Springer-Verlag
ISBN: 366312018X
Category : Technology & Engineering
Languages : de
Pages : 223

View

Book Description

Author: Segio Greco
Publisher: Morgan & Claypool Publishers
ISBN: 1608459276
Category : Computers
Languages : en
Pages : 125

View

Book Description
The chase has long been used as a central tool to analyze dependencies and their effect on queries. It has been applied to different relevant problems in database theory such as query optimization, query containment and equivalence, dependency implication, and database schema design. Recent years have seen a renewed interest in the chase as an important tool in several database applications, such as data exchange and integration, query answering in incomplete data, and many others. It is well known that the chase algorithm might be non-terminating and thus, in order for it to find practical applicability, it is crucial to identify cases where its termination is guaranteed. Another important aspect to consider when dealing with the chase is that it can introduce null values into the database, thereby leading to incomplete data. Thus, in several scenarios where the chase is used the problem of dealing with data dependencies and incomplete data arises. This book discusses fundamental issues concerning data dependencies and incomplete data with a particular focus on the chase and its applications in different database areas. We report recent results about the crucial issue of identifying conditions that guarantee the chase termination. Different database applications where the chase is a central tool are discussed with particular attention devoted to query answering in the presence of data dependencies and database schema design. Table of Contents: Introduction / Relational Databases / Incomplete Databases / The Chase Algorithm / Chase Termination / Data Dependencies and Normal Forms / Universal Repairs / Chase and Database Applications

Author:
Publisher: Vieweg+Teubner Verlag
ISBN: 9783663120193
Category : Technology & Engineering
Languages : de
Pages : 221

View

Book Description

Author: Stefan Stanczyk
Publisher: CRC Press
ISBN: 0203164563
Category : Computers
Languages : en
Pages : 254

View

Book Description
The study of relationship databases is a core component of virtually every undergraduate computer science degree course. This new edition of Theory and Practice of Relationship Databases retains all the features that made the previous edition such as success, and goes on to give even more comprehensive and informative coverage. Written in a tutorial style and containing a great many examples and exercises as well as extensively using illustrative and explanatory graphics, the author has produced an undergraduate textbook of great depth and clarity that is very easy to follow. The subject of relational databases is brought to life by the writing style and the inclusion of an homogenous case study that reinforces the issues dealt with in each chapter. The primary objective of the book is to present a comprehensive explanation of the process of development of database application systems within the framework of a set processing paradigm. Since the majority of these applications are built as relationship systems, a complete though reasonably concise account of that model is presented. Dr. Stanczyk has achieved this by concentrating on the issues that contribute significantly to the application development while de-emphasizing purely theoretical aspects of the subject. This has led to an imaginative and highly practical textbook that will be an excellent read for the undergraduate computer science student.

Author: S. K. Singh
Publisher: Pearson Education India
ISBN: 9788131760925
Category : Database design
Languages : en
Pages : 954

View

Book Description
The second edition of this bestselling title is a perfect blend of theoretical knowledge and practical application. It progresses gradually from basic to advance concepts in database management systems, with numerous solved exercises to make learning easier and interesting. New to this edition are discussions on more commercial database management systems.

Author: Sergio Greco
Publisher: Springer Nature
ISBN: 3031018931
Category : Computers
Languages : en
Pages : 111

View

Book Description
The chase has long been used as a central tool to analyze dependencies and their effect on queries. It has been applied to different relevant problems in database theory such as query optimization, query containment and equivalence, dependency implication, and database schema design. Recent years have seen a renewed interest in the chase as an important tool in several database applications, such as data exchange and integration, query answering in incomplete data, and many others. It is well known that the chase algorithm might be non-terminating and thus, in order for it to find practical applicability, it is crucial to identify cases where its termination is guaranteed. Another important aspect to consider when dealing with the chase is that it can introduce null values into the database, thereby leading to incomplete data. Thus, in several scenarios where the chase is used the problem of dealing with data dependencies and incomplete data arises. This book discusses fundamental issues concerning data dependencies and incomplete data with a particular focus on the chase and its applications in different database areas. We report recent results about the crucial issue of identifying conditions that guarantee the chase termination. Different database applications where the chase is a central tool are discussed with particular attention devoted to query answering in the presence of data dependencies and database schema design. Table of Contents: Introduction / Relational Databases / Incomplete Databases / The Chase Algorithm / Chase Termination / Data Dependencies and Normal Forms / Universal Repairs / Chase and Database Applications

Author: D A Bell
Publisher: Elsevier
ISBN: 148315291X
Category : Computers
Languages : en
Pages : 481

View

Book Description
Relational Databases explores the major advances in relational databases and provides a balanced analysis of the state of the art in relational databases. Topics covered include capture and analysis of data placement requirements; distributed relational database systems; data dependency manipulation in database schemata; and relational database support for computer graphics and computer aided design. This book is divided into three sections and begins with an overview of the theory and practice of distributed systems, using the example of INGRES from Relational Technology as illustration. The following chapters focus on whether relational and relational-like systems actually meet business needs; IBM's Structured Query Language/Data System (SQL/DS); tools for database design and programming; and Secondary Access Methods and the problem of secondary index selection. A number of quantitative models for assessing the performance of physical databases are also described. This text concludes by assessing some of the most conspicuous trends in relational database research and development. This monograph will be of interest to database designers.

Author: David C. Hopkins
Publisher: Trafford Publishing
ISBN: 1425182801
Category : Computers
Languages : en
Pages : 131

View

Book Description
This book provides a concise presentation of the basic principles of database design. It deals with the widely accepted core definitions and conclusions that can be precisely stated and proven. Most of the topics covered are essential to the concluding chapter on â oenormalizationâ â " a knowledge of which is crucial for avoiding problematic database designs. In addition to brevity, the structure of the book is meant to minimize page turning by making it unnecessary to flip back to previous pages. For example, to allow the reader to view all the information on a topic at once, the text appears on the left and the corresponding examples on the right of facing pages. The book consists of five chapters as follows: The first two describe the basic techniques of modeling the real world with a database. Chapter Three covers common â oeoperationsâ one can do with a database. Most of these operations pertain to using rather than designing a database; however, a few of them are also crucial for design. â oeDependency and decompositionâ â " important in their own right and also required for the final chapter â " receive a comprehensive treatment in Chapter Four. The book concludes with Chapter Five's coverage of normalization where the levels of good database design are defined along with procedures for attaining these levels. Also, problems that can occur when a database is not at a given level are described and illustrated by examples.

Author: Xiaobing Chen
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780315837928
Category : Database management
Languages : en
Pages : 226

View

Book Description

Author: Héctor Juan Hernandez-Lopez
Publisher:
ISBN:
Category : Database design
Languages : en
Pages : 248

View

Book Description