During my cardinality estimator presentation in DBA virtual group, there was a question asked about NULL values and histograms. I am quoting the question as is “SQL Server include null values in the index. How are statistics handle null values?” I will answer the question in this blog post. For demo purposes, I will be […]
This is a session about cardinality estimation, a phase during query optimization. I presented the session to following user groups. Pass DBA Virtual Chapter on April 25, 2017 SQL Saturday Rochester (#619) on April 29, 2017 Rhode Island SQL Server User Group on May 03, 2017 Maine PASS Chapter on May 18, 2017 Seacoast SQL […]
I thank Koen Verbeeck (b|t) for hosting TSQL Tuesday #89. Topic for this month The times they are a-changing inspired by the blog post Will the Cloud Eat My DBA Job? by Kendra Little. I was glad to see this topic was chosen. I clearly remembered reading this blog post and thanking kendra for writing […]
Today there was a question submitted in dba.stackexchange.com with the heading “Suppressing non-ANSI warnings in SQLCMD script”. Details here. In summary, this happens when you use a script to create a SQL Agent job and one of the job steps has conditions (under advanced properties) to go to certain steps in case of success or […]
I will explain how you can use sp_MSforeachdb stored procedure against READ_WRITE database only. There are numerous articles on the web about excluding databases using database id or name. Recently I needed a script to run against databases that are part of Always On Availability Groups and in READ_WRITE status. I used the ‘Updateability’ properties […]
