Count right side of join where values not exist, null values

[Anonymous]

Hi,

I'm trying to count the right side join where values doesnt exist, in other words, where the relations is null.

This is the model, I need count the missing date in transactions, in this case is only 1 for 03/01/2021

[parry2k]

@Anonymous try these measures, not sure if in the matrix you want to use date, since you are showing the summary at the person level, not person + date level

Total Days = COUNTROWS ('Calendar' )

Missing Days = [Total Days] - COUNTROWS (  SUMMARIZE ( 'Tran','Calendar'[Date] ) )

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[AlexisOlson · Accepted solution]

Assuming the date in your matrix is a measure rather than a dimension, you should be able to write a measure for missing date like this:

missing dates =
COUNTROWS (
    FILTER ( 'Calendar', ISBLANK ( CALCULATE ( MAX ( Transactions[TransDate] ) ) ) )
)