Most Popular Statistics

How to Create and Update SQL Server Statistics

To get started, let’s take a look at the various ways statistics can be created and updated. Statistics are created in several ways: automatically by the query optimizer (if the default option to automatically create statistics, AUTO_CREATE_STATISTICS, is on), when an index is created, and explicitly (for example, via the CREATE STATISTICS statement). Statistics can be […]

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Why SQL Server Statistics Matter

To estimate the cost of an execution plan, the query optimizer needs to know, as precisely as possible, the number of records returned by a given query, and to help with this cardinality estimation, SQL Server uses and maintains optimizer statistics. Statistics contain statistical information describing the distribution of values in one or more columns […]

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