The key to understanding DAX is getting to grips with the challenging concepts that underpin the expressions. Most DAX expressions you’ll write will amount to only a few lines of code, but it’s what goes on under the hood that is the secret to understanding their evaluation. For example, take this DAX expression:
=MAXX ( Customers, [Total Sales] )
It comprises a function, a table name, and a measure name. It should be simple to understand. However, to unravel the calculation behind this expression, you would ...
