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Anonymous
Not applicable

## Calculate days between dates that cross months

Hi,

I'm at an impass, I've got a table with the start and end date and a column that identifes the number of dates in between.

I've written the following measure

Absence Days in Mth =

VAR firstDayOfMonth =

MIN ( 'DateDimension'[Date] )

VAR lastDayOfMonth =

MAX ( 'DateDimension'[Date]  )

RETURN

SUMX (

Absence,

VAR s =

MAX ( Absence[StartDate], firstDayOfMonth )

VAR e =

MIN (Absence[EndDate], lastDayOfMonth )

RETURN

IF ( s < e, DATEDIFF ( s-1, e, DAY ) )

)

When I put this measure as a card on my report and then use the Month (date Table) as a filter I get the correct value for March of 4. For April I get 30 rather than 30 + 22 from the first row.

My date table is joined to the absence table on date - startdate.

How do I get this so it picks up the April figure of the first record when I filter for April.

TIA

1 ACCEPTED SOLUTION
Community Champion

In general, calendar table in such inteval calculations doesn't function as a dimension like other date-oriented analysis.

Tricky solution to the tricky question,

 Thanks to the great efforts by MS engineers to simplify syntax of DAX! Most beginners are SUCCESSFULLY MISLED to think that they could easily master DAX; but it turns out that the intricacy of the most frequently used RANKX() is still way beyond their comprehension! DAX is simple, but NOT EASY!
2 REPLIES 2
Community Champion

In general, calendar table in such inteval calculations doesn't function as a dimension like other date-oriented analysis.

Tricky solution to the tricky question,

 Thanks to the great efforts by MS engineers to simplify syntax of DAX! Most beginners are SUCCESSFULLY MISLED to think that they could easily master DAX; but it turns out that the intricacy of the most frequently used RANKX() is still way beyond their comprehension! DAX is simple, but NOT EASY!
Anonymous
Not applicable

Thank you, thats worked perfectly.

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