My current DB is Microsoft SQL server 2014, can it be upgraded to SQL server 2017.
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Yes you can upgrade your current version to higher version.Please find the below links for step by step to upgrade your current version.
Welcome to the Community !
Yes, you can definetly upgrade from 2014 to 2017 / the latest version of SQL. This will not cause any issue with Insights. Keep an eye on Microsoft Licensing & ensure you take a full back up all the Databases before you upgrade (just in case).
Kudos ! Hope that helps