SQLFacts is a FREE suite of 26 (and counting) tools for SQL Server database development, database administration, and performance tuning. The toolkit is all T-SQL code and it includes the functionality of hundreds of short scripts.
In this article we look at different use cases for columnstore indexes like when performing SQL Server count * queries.
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.
Introduction Instead of going straight into the topic of the Query Store, I would like to start this Stairway Series by mentioning a few performance tuning scenarios that are very common to production DBAs. I think most of us have been in one of these situations at some time: An application experiencing slowness after a […]