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RESAMPLE Update each statistic using its most recent sample rate. For example, statistics for indexes use a full-table scan for their sample rate.When none of the sample options (SAMPLE, FULLSCAN, RESAMPLE) are specified, the query optimizer samples the data and computes the sample size by default.ON PARTITIONS ( [, …n] ) ] Forces the leaf-level statistics covering the partitions specified in the ON PARTITIONS clause to be recomputed, and then merged to build the global statistics.WITH RESAMPLE is required because partition statistics built with different sample rates cannot be merged together.The query optimizer will use parallel sample statistics, whenever a table size exceeds a certain threshold. When neither SAMPLE nor FULLSCAN is specified, the query optimizer uses sampled data and computes the sample size by default.We recommend against specifying 0 PERCENT or 0 ROWS.

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If none of the options are specified, the UPDATE STATISTICS statement updates all statistics on the table or indexed view.

In most situations, it is not necessary to specify SAMPLE because the query optimizer uses sampling and determines the statistically significant sample size by default, as required to create high-quality query plans.

Starting with SQL Server 2016, sampling of data to build statistics is done in parallel, when using compatibility level 130, to improve the performance of statistics collection.

To view all indexes for a table or view, you can use sp_helpindex.

FULLSCAN Compute statistics by scanning all rows in the table or indexed view. The actual percentage or number of rows the query optimizer samples might not match the percentage or number specified.

If none of the options are specified, the UPDATE STATISTICS statement updates all statistics on the table or indexed view.In most situations, it is not necessary to specify SAMPLE because the query optimizer uses sampling and determines the statistically significant sample size by default, as required to create high-quality query plans.Starting with SQL Server 2016, sampling of data to build statistics is done in parallel, when using compatibility level 130, to improve the performance of statistics collection.To view all indexes for a table or view, you can use sp_helpindex.FULLSCAN Compute statistics by scanning all rows in the table or indexed view. The actual percentage or number of rows the query optimizer samples might not match the percentage or number specified.NORECOMPUTE Disable the automatic statistics update option, AUTO_UPDATE_STATISTICS, for the specified statistics.