selectivity
selectivity 英 [sɪlek'tɪvɪtɪ;sel-;siːl-] 美 [sə,lɛk'tɪvəti]
n. 选择性;分离性;选择度
名词复数:selectivities
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- n. 选择性;分离性;选择度
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1. At the same time, we also have found differences in signal selectivity that may allow us to target some bacteria while ignoring others.
同时,我们还发现了信号选择性的差异,这能够使我们针对一些特定的细菌而不影响到其他。
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2. However, in the absence of data distribution information, the optimizer will calculate selectivity for filters of different types based on table indexes.
然而在缺乏数据分布信息的情况下,优化器将基于表索引计算不同类型筛选器的选择性。
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3. Sometimes, due to a skew in the distribution of data, the nature of the predicate or the query, or insufficient statistics, the optimizer's selectivity estimates may not be accurate.
有时候,由于在数据分布上的一点偏差,加上谓词或查询的特性,或者由于统计信息不充分,可能导致优化器的选择性估计不准确。
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