真实的人
发表于 2025-3-28 14:56:41
A Multivariate Statistical Model for Data Base Performance Evaluation selectivities). This paper presents a multivariate statistical model for the estimation of record selectivities. The model takes into account non-uniformity and correlations of the attribute values in the data base, as well as non-uniformity and correlations of the attribute values in queries.
aggrieve
发表于 2025-3-28 22:07:59
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可行
发表于 2025-3-29 00:24:36
International Political Economy Serieshttp://image.papertrans.cn/c/image/239637.jpg