An Extended Entity-Relationship Model

Fundamentals and Pragmatics

Paperback Engels 1994 1994e druk 9783540576488
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Samenvatting

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.

Specificaties

ISBN13:9783540576488
Taal:Engels
Bindwijze:paperback
Aantal pagina's:141
Uitgever:Springer Berlin Heidelberg
Druk:1994

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Inhoudsopgave

Structure of data and entities.- Extended Entity-Relationship calculus.- PROLOG implementation.- Formal semantics of SQL.- Conclusions.

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        An Extended Entity-Relationship Model