Why A Query May be Faster the Second Time it Runs
Today, Kendra Little explains why a query may run faster the second time you run it.
2020-01-29
517 reads
Query Tuning
Optimize Your SQL by Reformulating the Spec
As SQL developers, we tend to think of performance tuning in terms of crafting the best table indices, avoiding scalar and table valued functions, and analyzing query plans (among other things). But sometimes going back to the spec and applying some properties of elementary math can be the best way to begin to improve performance of SQL queries which implement mathematical formulas. This article is a case study of how I used this technique to optimize my SQL implementation of the Inverse Simpson Index.
2019-09-12
2,856 reads
2019-11-01 (first published: 2017-09-11)
5,021 reads
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