Updating large tables


Well, in that case you probably select All existing statistics and update some statistics for a second time, which is really a waste.Therefore, if you’re on SQL Server 2016, you probably want to look at more intelligent updates.If I let SQL Server update statistics automatically, I would need 400,500 rows to change.


We start with climate diagnostics — people are usually most interested in climate change itself.We include some data from other scientists or their web sites, as indicated.Continual updating of data curves, whether global temperature, the Greenland ice sheet mass, the sun's brightness, Keeling's carbon dioxide record, or other more obscure quantities, is a most interesting aspect of science.In the example above, only 8% of data changed – probably not enough to require me to update statistics.

It’s quite possible that some statistics need to be updated daily because there is a high rate of change, and other statistics only need to be updated weekly or monthly because data doesn’t change much at all.

We can programmatically determine whether we need to update statistics using the sys.dm_db_stats_properties DMF.



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