You may look into this extension https://marketplace.thingworx.com/tools/Relational-databases-connectors
and this thread Steps to connecting to your Relational Database
Thanks for your quick answer, but in this case my question is related to use SQL Server 2012 as the default DB for a fresh install of ThingWorx as detailed on the following guide using (here the recommendation is SQL 2014):
I'm familiar already with the extension and the Jar diver files as I've been using them previously for other projects.
I just want to know if I can use 2012 and if its recommended for a production environment.