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Since both LASTNAME and DEPTNO are part of the index, we will get index-only access.
因为LASTNAME和DEPTNO都是索引的一部分,我们将获得仅限索引的访问。
youdao
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Since both LASTNAME and DEPTNO are part of the index, we will get index-only access.
因为LASTNAME和DEPTNO都是索引的一部分,我们将获得仅限索引的访问。
youdao