Best forum for posting database table questions?

Hello,

I am using tableau to visualise our Sage 300 data. As I have had (and will have) quote a couple of questions around database tables, and how they fit together, I'd like to be sure of the fourm I should be posting to. 

Out of the list here, could one of the admins please tell me the most appropriate forum to post to?

Thank you as always,
Michelle