Index selectivity
When SQL Server evaluates if an index should be used to retrieve data in a query, selectivity is one of the most important factors. Of course, given that the index column matches the filter or join...
View ArticleCapturing Long Running Queries
Long running queries in a database may or may not be a problem, depending on the type of system. In a data warehouse solution, queries that runs for several minutes may be perfectly normal and nothing...
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