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## If won, then calculate difference between two dates

I'm trying to add a calculated column to calculate the number of days between two dates. However, I need to only calculate for those that meet a certain criteria.

The formula I tried is:

`DiffCloseDate = if(Opportunities[Status]="won",(Opportunities[Actual Close Date]-Opportunities[Est Close Date]),"")`

For the 'then' clause, I also tried

`Datediff(Opportunities[Est Clsoe Date],Opportunities[Actual Close Date],Days)`

The error I'm receiving is:

A single value for column 'Actual Close Date' in table Opportunities cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single result.

But, I don't want to aggregate the dates. I just want each row to perform the calculation.

Thanks for any help.

1 ACCEPTED SOLUTION
Super User

Are you sure that you are using a calculated column because the error you are getting is for a measure. If you use a calculated column, your formula would generate an error regarding "variant" data because you are trying to return a number and a string at the same time. Both have to agree in terms of the data type returned. So, you could do something like this as a calculated column (not a measure)

`DiffCloseDate = IF(Opportunities[Status]="won",Opportunities[Actual Close Date]-Opportunities[Est Close Date],-999)`

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DAX is easy, CALCULATE makes DAX hard...
2 REPLIES 2
Super User

Are you sure that you are using a calculated column because the error you are getting is for a measure. If you use a calculated column, your formula would generate an error regarding "variant" data because you are trying to return a number and a string at the same time. Both have to agree in terms of the data type returned. So, you could do something like this as a calculated column (not a measure)

`DiffCloseDate = IF(Opportunities[Status]="won",Opportunities[Actual Close Date]-Opportunities[Est Close Date],-999)`

Become an expert!: Enterprise DNA
External Tools: MSHGQM
Latest book!:
Power BI Cookbook Third Edition (Color)

DAX is easy, CALCULATE makes DAX hard...
Resident Rockstar

@lguelcher, are you defining this column in the 'Opportunities' table?

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