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CUMULATIVE SUM by drilldown

hi, i have datas that look like the following example:


i need to add another column to the graph with a cumulative sum of the "value" column but it has to restart from 0 on every subcategory (SCAT). i can't figure out how to do it, can someone help pls?

Super User
Super User

@Samuele_M , Try to use window function


Cumm Based on subcategory= CALCULATE([Your measure], Window(1,ABS,0,REL, ALLSELECTED('Table'[Category],'Table'[subcategory]),ORDERBY('Table'[subcategory],asc),,partitionBy('Table'[Category])))


Continue to explore Power BI Window function Rolling, Cumulative/Running Total, WTD, MTD, QTD, YTD, FYTD:

Ty!! this works but i have so many subcategories that it takes few minutes to load; is there any way to optimize the measure? will it be faster if i make it in powerquery following this guide?

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