Dear Michael, thank you very much, this is what I was looking for. I myself supposed the answer should be related to "remote references", but was not sure how to use them.
Just one point is not yet optimum to me: I do not have just 2 tables, but hundreds. It would be hard and not very clean to add them all one by one. Do you know if it there is a better way to reference remote tables? For example telling org-mode to search data from all tables but "this" one? Best regards, Martin
