Today I will write just a short blog post to do a quick reminder! I still hear a lot of people suggesting CTEs because they think it works like a temporary table (you populate the table and then it can be/is reutilized). It doesn’t! From de documentation : Specifies a temporary named result set, known as a common table expression (CTE). Maybe they are focusing on the “temporary” word. Using the CTE two times will perform two different executions!

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Before I complete my question let me provide context. I’ve received an alert saying that a specific database could not allocate a new page (disk was full) The message that you will see on the SQL Server Error log is: Could not allocate a new page for database ’’ because of insufficient disk space in filegroup ‘’. Create the necessary space by dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup.

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