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(Association for Computing Machinery (ACM), 2006)The problem of rewriting aggregate queries using views is studied for conjunctive queries with arbitrary aggregation functions and built-in predicates. Two types of queries over views are introduced for rewriting aggregate ...
(Association for Computing Machinery (ACM), 2006)
(Springer Verlag (Germany), 2006)This paper introduces a temporal class diagram language useful to model temporal varying data. The atemporal portion of the language contains the core constructors available in both EER diagrams and UML class diagrams. The ...