Indexing

Indexes: When Column Selectivity Is Not Always A Requirement

  • Article

While preparing for my SQL Saturday Salt Lake City presentation, Climbing the B-Tree, I ran into one of the “word of mouth” facts that the first column of an index should be highly selective, i.e., it should only point to one or a few rows. This is not always the case and I’ll show you […]

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2020-09-16

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