本文将详细介绍 DISTINCT 和 GROUP BY 的区别、适用场景以及它们对查询性能的影响。 在 SQL 查询中，DISTINCT 和 GROUP BY 是两个常见的用于去重和分组的操作符。然而，尽管它们在某些情况下可以达到相同的效果，但它们在原理、适用场景和性能方面却有很大的不同。

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Crosstab with zero counts and counts of distinct values proc freq and sql %let pgm=utl-crosstab-with-zero-counts-and-counts-of-distinct-values-wpe_r_sql; ...

GROUP BY implicitly sorts by default (that is, in the absence of ASC or DESC designators for GROUP BY columns). However, relying on implicit GROUP BY sorting (that is, sorting in the absence of ASC or ...

Aerin Medical Inc., a company dedicated to providing Ear, Nose and Throat (ENT) physicians with non-invasive solutions for the treatment of chronic nasal conditions, supports the recent American ...

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Natural products provide the inspiration for most drugs, and marine natural products, in particular, are emerging as promising new therapeutics with new targets or mechanisms of action.

We have a server with full text searching enabled and another where it is not. We have a stored proc that checks if full text indexing is enabled and runs a search query as appropriate but the issue ...