I have lots of pupils in power query, and have managed to create a table similar to the following:
The problem I face is that the subjects do not align. That is to say, Art can be in column "Subject 1" and "Subject 6".
Each subject appears in Power BI as a separate field. I want the slicer to forego the need to expand subject 1 to see subject 2, but rather that it just says "art" and then shows me all pupils that take art.
Is this possible? I considered looking at somehow aligning columns in power query, but thought this would be a monstrous task vs a hopefully simpler one at the Power BI end.
I'm so painfully unfamiliar with DAX etc, or how to best use measures that I can't see a way round this problem myself.