I will look into this, to give a bit more insight, what I am trying to do is display on a graph the Joiners and Leavers of a company based on a selection from the Master Calendar (i.e. If I Select 2010, 2011, 2012 & 2013, I want to see the numbers for those who have joined and those who have left). Maybe I'm approaching this from completely the wrong angle? I'm still fairly new to QlikView.
My qvw can be found on the attached link, if it helps.
Excellent, thanks for assistance on the expressions, this really helps.
The Data Model was assisted by reading through the "QlkiView 11 for Developers" by Miguel Garcia and Barry Harmsen and also a few threads on here, particularly with regards to the MapLink table, I used a qvw that Rob Wunderlich linked to on this thread (http://community.qlik.com/message/320160#320160) and applied it to my data. It was very useful.