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- W4312876546 abstract "Data warehouse dimensions are usually considered to be static because their schema and data tend not to change; however, both dimension schema and dimension data can change. This paper focuses on a type of dimension data change called reclassification which occurs when a member of a certain level becomes a member of a higher level in the same dimension, e.g. when a product changes category (it is reclassified). This type of change gives rise to the notion of classification period and to a type of query that can be useful for decision-support. For example, What were total chess-set sales during first classification period in Toy category? A set of operators has been proposed to facilitate formulating this type of query and it is shown how to incorporate them in SQL, a familiar database developer language. Our operators' expressivity is also shown because formulating such queries without using these operators usually leads to complex and nonintuitive solutions." @default.
- W4312876546 created "2023-01-05" @default.
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- W4312876546 date "2011-01-01" @default.
- W4312876546 modified "2023-10-16" @default.
- W4312876546 title "Operators for reclassification queries in a temporal multidimensional model" @default.
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- W4312876546 doi "https://doi.org/10.15446/ing.investig.v31n1.20531" @default.
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