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For installation or setup questions, refer to the Setup Forum. So, in this blog, we are going to discuss about update statistics and rebuild the index and also describing the need to update statistics before and after rebuilding indexes in SQL server.
In case, if users want to rebuild all the indexes and update all the statistics in SQL server. Then, all the index statistics will be updated through scanning all the rows on the table. The following example creates and then updates the statistics for the Name and ProductNumber columns in the Product table. The following example updates the Products statistics in the Product table, forces a full scan of all rows in the Product table, and turns off automatic statistics for the Products statistics.
The following example updates the CustomerStats1 statistics on the Customer table. The following example updates the CustomerStats1 statistics, based on scanning all of the rows in the Customer table. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback?
Note If the table is truncated, all statistics built on the truncated HoBT will revert to using the default sampling percentage. Query Store Hints provide the ability to add a hint to a statement even if you do not have direct code access. I wrote the original Query Store performance overhead post just over two years ago, and just like the data in your database keeps changing, so.
Do you need to update statistics after an upgrade? Erin Stellato May 11, Official Microsoft documentation about the stats blog change in SQL Server is difficult to find, but this article includes the following paragraph: After you upgrade from SQL Server , update statistics on all databases. Today The statistics blob has not changed since SQL Server to my knowledge, but I thought I would ask someone from Microsoft for an official recommendation to share publicly.
Further items to note: If Microsoft updates the format of statistics e. Microsoft does not always upgrade the statistics format as part of a major version upgrade. There are occasions where Microsoft does not change the format of statistics, but they do change the algorithm for creating statistics as part of a major version upgrade or database compatibility level change.
Conclusion As part of your upgrade methodology, it is recommended by me, based on experience with a lot of customer upgrades to build in time to update statistics. Some kind reminders: Updating statistics is an online operation, therefore, the database and related applications are accessible and usable. Therefore, if you decide to change your schema after upgrading your SQL Server version not something I would typically recommend , do that before you update stats.
You need to update statistics regularly to provide the optimizer with current information about your data, so at some point it needs to be done.
Immediately after an upgrade is a really good time, considering the aforementioned items. So that implies it is ONLY needed for those tables.
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