To illustrate my question, I've created a small QV file and a image.
I hope both are clear... if not, do not hesitate to ask me further details.
In short, there are two questions:
I've made some set analysis trials, but I can't get it work...
Any help is highly appriciated (as always )
I had a look but I don't understand your datamodel as provided in your qvw.
According to your point 2. a Propertys(Kalium/Natrium) price depends on the date,
so I would assume there would be a direct link between Property and Tariff,
but in your model it goes thru a couple of other tables.
Why is that?