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Sql updating

We noticed that after we deleted the data and did a normal UPDATE STATISTICS command, the statistics would be useful for about three to four hours.

are metadata about the data within a table and they're created and updated on a column-by-column basis, not on the entire table.

The database engine employs statistics when generating execution plans that are used to access data stored within the database.

Even worse, it would perform a table scan instead of any index operation at all.

Auto create statistics and auto update statistics Each database has two options related to statistics: auto create statistics and auto update statistics.

The prefered method for updating SQL Server statistics is the UPDATE STATISTICS command.

This command allows much greater flexibility when programming, however it does require more initial programming.

The sp_updatestats procedure has the same effect as running the UPDATE STATISTICS command using the ALL keyword.