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I need to connect 2 tables, but my problem is that I don't know how to create this key, as
only 1 parameter is found in both tables, the second parameter is coming out of a third table.
The situation causes a circular reference as shown in attached picture.
Does anybody know how I can avoid this ? I have (as a beginner) no idea at all how I could create
a usefull key with these 3 tables..
Thanks for your help.