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An Extended Entity-Relationship Model: Fundamentals and Pragmatics (Lecture Notes in Computer Science) [Paperback]

Martin Gogolla (Author)

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Product details

Paperback: 136 pages
Publisher: Springer (28 Jan 1994)
Language English
ISBN-10: 3540576487
ISBN-13: 978-3540576488
Product Dimensions: 22.9 x 15.2 x 1 cm
Amazon Bestsellers Rank: 5,619,858 in Books (See Top 100 in Books)

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Product Description

This text presents a comprehensive introduction to an extended Entity-Relationship model both on a conceptual and on a formal, mathematicallevel. In addition to the primitives given by the data model the text introduces a language for the formulation of constraints in order to restrict database states to consistent ones. The text explains an implementation of the approach chosen in the logic programing language PROLOG and discusses in this context the computational power of the proposedcalculus. The extended Entity-Relationship calculus is used to define the meaning of the relational query language SQL. A nice feature of the approach is that it becomes possible to prove language properties on a sound mathematical basis.

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First Sentence
Before presenting a formal definition of the extended Entity-Relationship model we offer a brief informal description of it in the form of an example. Read the first page

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