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Titolo: Advances in Data Base Theory

Casa editrice: Plenum Pub Corp

Data di pubblicazione: 1981

Legatura: No jacket

Condizione: Bon

Descrizione articolo

Contenuti:

Background for Advances in Data Base Theory.- Data Base Design.- On the Properties of Join Dependencies.- Decomposition of Relations: A Comprehensive Approach.- Adequacy of Decompositions of Relational Databases.- A Method for Helping Discover the Dependencies of a Relation.- General Laws: Deduction and Integrity.- On the Integrity of Typed First Order Data Bases.- Equations Compared with Clauses for Specification of Abstract Data Types.- Optimization in Deductive and Conventional Relational Database Systems.- On Evaluation of Queries Containing Derived Relations in a Relational Data Base.- Reasoning with Data in a Deductively Augmented Data Management System.- Informative Capabilities for Users.- A Formal Approach to Null Values in Database Relations.- About Natural Logic.- Assigning Meaning to Ill-Defined Queries Expressed in Predicate Calculus Language.- On the Feasibility of Informative Answers.- Name Index.- List of Referees.- Addresses of Contributing Authors.

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English below. Ammareal est une librairie professionnelle sp�cialis�e dans le livre d?occasion. Nous exp�dions partout dans le monde. Nous avons plus de 250 000 ouvrages en stock dont un grand nombre de livres techniques et acad�miques. Nous reversons jusqu?� 15% du prix de vente de chaque livre � des organisations caritatives, des biblioth�ques et des associations luttant contre l?illettrisme. Ce que nous ne vendons pas nous le donnons, ce que nous ne donnons pas nous le recyclons. Ammareal is a professional bookseller speciliazed in used books. We ship worldwide. We have more than 250 000 books in stock, including a large number of technical and university-level books. We give back up to 15% of the price of each book to charities, libraries and organizations fighting in favor of literacy. What we do not sell, we give, what we do not give we recycle.

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