When you open any screen in sage you will see at the top left hand corner of the screen a database id.  Eg with the sample database you will see SAMINC.  Look for that and that will be the database you connect to, I think that's what you're asking for, then you need to look at the Application Object Models to determine which table you need within that database eg APVEN for AP Vendors.

WOW thank you so much! I will let you know if it works, I hope I get the job ;)

WOW thank you so much! I will let you know if it works, I hope I get the job ;)