Updating more than one column

08-Feb-2020 14:38 by 6 Comments

Updating more than one column - naji dating dating com

Run the next statement to update the column statistics only.You can validate that only the column statistics were updated by looking at the update_date column which uses the STATS_DATE function to display the last date the statistics were updated.

Some other more complicated scenarios include when you have jobs which rebuild your indexes based on their fragmentation level.So depending on your maintenance jobs and scripts several scenarios can exist.The simplest scenario is if you want to rebuild all the indexes and update all the statistics.REBUILD statement, will update only index statistics with the equivalent of using WITH FULLSCAN.Rebuilding indexes does not update any column statistics.Of course, the worst case scenario would be if you first rebuild your indexes, which also updates the index statistics by scanning the entire table, and later you run UPDATE STATISTICS using the default values, which again updates the index statistics but this time only with a default and smaller sample.

Not only you are updating your index statistics twice but you are overwriting the better of the two choices.Run again the query to verify that a new statistics object for the Product ID column has been created.Notice the value of the auto_created column which tells if the statistics were automatically created by the query processor.But what I see most often is that someone configures the Rebuild Index task, and then has the Update Statistics task as the next step.In that case, if you are running SQL Server 2014 and below, you want to update Column statistics only.As mentioned before, if you rebuild all your indexes then all the index statistics will also be updated by scanning all the rows on the table.

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