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- W49673616 abstract "For n fields used for grouping we can obtain 2n aggregation types. When n is not small, 2n is a considerable value. With a new model for the specification of aggregation types, we present ways in which we can obtain any subsets of aggregation types, starting from n fields used for grouping. The algorithms concern cases in which: The specification of aggregation types is made after we insert the data in the tables; The specification of aggregation types is made before we insert the data in the tables. In order to obtain the results really fast, we also use hypercubes; - The case of one table (the fields used for grouping and for aggregation are from the same table) where we use one hypercube and we can specify the aggregation types in any moment (after or before the data insertion in the table) - model which can be used for questionnaires. These algorithms can be used in many economic analyses, in order to obtain complex reports. We will also present an example which concerns the sales in a supermarket chain. In our study we have worked with databases from Access and we have made the algorithm implementation in Delphi, but the implementation can also be made in other programming environments and we can also use other relational databases." @default.
- W49673616 created "2016-06-24" @default.
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- W49673616 date "2008-06-24" @default.
- W49673616 modified "2023-09-26" @default.
- W49673616 title "Plenary lecture V: algorithms used to obtain aggregated value sets from relational databases" @default.
- W49673616 hasPublicationYear "2008" @default.
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