What is the difference between the associative logic in qv when compared to the traditional databases?
come on, this is 100% Qlikview-Basics. You have over 1000 points collected here, so I would assume, that you have at least a little bit Qlikview knowledge and understanding. If you have ever worked with a relational database (MS Access, SQL-Server, MySQL, Oracle, ...) and with Qlikview, too, you should be able to answer your question yourself.
Instead you are asking thousands of very general question which should be clear by reading a handful of whitepapers or the manuals.