DAX and PowerPivot Essentials: More about Calculated Columns and Measures, Counting and Filtering, Part 3 In the charter article of this series, DAX and PowerPivot Essentials: Introduction to PowerPivot, DAX and the Related() and Distinct() Functions, we introduced the powerful PowerPivot / DAX combination, noting that this add-on to Microsoft Office Excel 2010 (embedded, and only needing to be enabled,…