英语词汇overall selectivity怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

1
?总选择性
... spectrum selectivity 频谱选择性 overall selectivity 总选择性 catalyst selectivity 催化剂选择性...

1
There is much less index access and no index AND'ing so that the overall performance can be one or two order of magnitude better - depending on predicate selectivity.
只有相当少的索引访问且没有索引 AND'ing，这样整体性能将提高一个或两个数量级 —— 取决于谓词选择。
2
These expressions prevent the optimizer from assigning valid cardinality or selectivity estimates and can in turn affect the overall plan and the join method.
上面表达式使优化器不能有效分配基数或选择性消耗，可能会反过来影响整个执行计划。

单词	overall selectivity
释义	overall selectivity 简明释义总选择性网络释义 1 ?总选择性 ... spectrum selectivity 频谱选择性 overall selectivity 总选择性 catalyst selectivity 催化剂选择性... 双语例句 1 There is much less index access and no index AND'ing so that the overall performance can be one or two order of magnitude better - depending on predicate selectivity. 只有相当少的索引访问且没有索引 AND'ing，这样整体性能将提高一个或两个数量级 —— 取决于谓词选择。 2 These expressions prevent the optimizer from assigning valid cardinality or selectivity estimates and can in turn affect the overall plan and the join method. 上面表达式使优化器不能有效分配基数或选择性消耗，可能会反过来影响整个执行计划。
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