Comments: Spine creases, wear to binding and pages from reading. May contain limited notes, underlining or highlighting that does affect the text. Possible ex library copy, thatll have the markings and stickers associated from the library. Accessories such as CD, codes, toys, may not be included.
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Publication Date: 1994
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.Gogolla, M. is the author of 'Extended Entity-Relationship Model', published 1994 under ISBN 9783540576488 and ISBN 3540576487.
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