Power BI DAX - 在结果集中重用度量

Question

I am new with DAX and Power BI. I have a Power BI resultset with an unique identifier (ID), a column (REF_ID) that references to the ID column, but is nullable, and a measure (MSR). Now I simply want to make a calculation: New_Measure = MSR (if REF_ID is NULL) New_Measure = MSR + MSR_REF_ID (so the MSR from the ID that is referencing from REF_ID).

Example: New_Measure(ID=3) = Measure(ID=3) + Measure(ID=6) = -5283619.953 + 1911594.57332966

Who can help???

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Answer 1

Create a new column in Power BI using below formula:

New_Measure = IF(Ref_ID = BLANK(), MSR, MSR + LOOKUPVALUE(MSR, ID, REF_ID))

You can refer syntax for IF and LOOKUPVALUE for DAX