Find differences between 2 selected rown in a table

johnstrang - This will take multiple steps.

1) Set up two DAX Calculated tables that will allow you to select a Campaign:

Campaign 1 = VALUES( 'Table'[Campaign] )

Campaign 2 = VALUES( 'Table'[Campaign] )

2) If you get a relationship created with either of these tables, ensure they are deleted. 

3) Create a measure that finds the values you want based on a slicer selection and then performs the calculation:

Difference = 

VAR _campaign_1 = SELECTEDVALUE( 'Campaign 1'[Campaign] )

VAR _campaign_2 = SELECTEDVALUE( 'Campaign 2'[Campaign] )

VAR _value_campaign_1 = CALCULATE( SUM( 'Table'[Column] ), KEEPFILTERS( 'Table'[Campaign] = _campaign_1 ))

VAR _value_campaign_2 = CALCULATE( SUM( 'Table'[Column] ), KEEPFILTERS( 'Table'[Campaign] = _campaign_2 ))

RETURN
_value_campaign_2 - _value_campaign_1

Just replace my 'Table' and [Column] references with the names from your model. 

If I answered your question please mark my post as the solution, it helps others with the same challenge find the answer!

Hi johnstrang ,

After thoroughly reviewing the details you provided, I was able to reproduce the scenario, and it worked on my end. I have used the sample data on my end and successfully implemented it.  

I am also including .pbix file for your better understanding, please have a look into it:

Hope this will help you resolve your issue, if you need any further assistance, feel free to reach out.

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Tejaswi