The very core of Qlik Sense is built on the associative data model. So this is what you get for "free" in Qlik Sense which is quite amazing when you see how disconnected things in Excel and SQL databases really are without doing a lot of joins and lookups.
If you want a more specific answer you will have to provide more details - like at least a simple description of the tables and fields involved with some few actual values and describe how you want this to work.
