Hello @s_kaymon,
I do not have experience with that specific tool, but I would answer you that, since it is a solution, and based on Common Data Model, the chance is very high that, yes, you will need to consider impact in external systems, such as databases.
My best suggestions for you:
1- Please read the system administration and migration guides http://support.sas.com/software/products/stm/index.html#s1=2
2- If you have more specific questions, or still something unclear, please post the question in the Customer Intelligence Community. I am sure @BeverlyBrown would be happy to help you with it. This is the link: https://communities.sas.com/t5/Customer-Intelligence/ct-p/ci
3- And, what would help you for sure, since you might consider all the specifics from your environment: in case of doubt, always contact SAS Technical Support.
Hope it helps,
Kind regards,
Juan