DAX help - counting single item lines

[Si_7777]

I have  measure to count PO's with single items

It kinda works but doesnt sum per day / week / per year

My measure is ; 

1 Items per PO =

    CALCULATE(COUNTROWS(Sage_POPOrderReturnLine)

    , FILTER(Sage_POPOrderReturnLine, DISTINCTCOUNT(Sage_POPOrderReturnLine[ItemCode]) = 1))

I have tried summerize but I am not getting the syntax correct.

[v-hashadapu]

Hi @Si_7777 , Thank you for reaching out to the Microsoft Community Forum.

We took sample data based on your scenario and recreated your matrix structure with Year -> Date -> PO Number. We rewrote the 1 Items per PO measure to first identify POs that have exactly one distinct item, then count them in the current filter context. This ensures the count is accurate at PO, daily and yearly levels without double-counting.

Please check the attached .pbix file for your reference and share your thoughts.

Thank you.