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- W2037701287 abstract "In decision support applications, the ability to provide fast approximate answers to aggregation queries is desirable. One commonly-used technique for approximate query answering is sampling. For many aggregation queries, appropriately constructed biased (non-uniform) samples can provide more accurate approximations than a uniform sample. The optimal type of bias, however, varies from query to query. In this paper, we describe an approximate query processing technique that dynamically constructs an appropriately biased sample for each query by combining samples selected from a family of non-uniform samples that are constructed during a pre-processing phase. We show that dynamic selection of appropriate portions of previously constructed samples can provide more accurate approximate answers than static, non-adaptive usage of uniform or non-uniform samples." @default.
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- W2037701287 date "2003-06-09" @default.
- W2037701287 modified "2023-09-30" @default.
- W2037701287 title "Dynamic sample selection for approximate query processing" @default.
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- W2037701287 doi "https://doi.org/10.1145/872757.872822" @default.
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