Query Processing Techniques in Data Warehousing Using Cost Model
نویسندگان
چکیده
منابع مشابه
Aggregate-Query Processing in Data Warehousing Environments
In this paper we introduce generalized projections (GP s), an extension of duplicateeliminating projections, that capture aggregations, groupbys, duplicate-eliminating projections (distinct), and duplicate-preserving projections in a common uni ed framework. Using GP s we extend well known and simple algorithms for SQL queries that use distinct projections to derive algorithms for queries using...
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ژورنال
عنوان ژورنال: The Electronic Journal of Information Systems in Developing Countries
سال: 2000
ISSN: 1681-4835
DOI: 10.1002/j.1681-4835.2000.tb00020.x