December 18, 2018
I'll explain my setup. My first column is called 'Month / Year' (a date column). My second column is called 'Operating Area' (a text column) and my third column is called 'Hours' (a number column).
I need to create a column that provides a rolling year-to-date sum of 'Hours' for each 'Operating Area'
January 31, 2022
Perhaps Phil's blog post on Grouped running Totals in PQ is what you need.