hi (Alexander and everybody else who is interested in this topic), sorry the thread is old and I did not update it, sadly Bastian did not react to my last post.
I just thought I try it myself, but its tricky and org-colview.el has 1000 lines of code. And I wrote only small functions in (e)lisp so far. But you did say something that it would be "totaly doable" to output what I want in a new buffer. I dont really care to much how it exactly work. I tried this also with org-tables and failed with it too. I just want a way to write down data (table or org-structure is both k) of this orders ONE time and get both data, the mean score of tea from a shop and the mean score from a tea brand (tea garden) so I can speculate if I just dont like tea from this plantage/region or if just that shop has low quality of tea. Do you have idea how I could get there a quick hack, of course it would be nice if it would be not a hardcoded tea-shop-function ^^. But maybe it would be easier to write it first static to exact this data.