Difference between dates considering only working days

[Anonymous]

I am having a little challenge counting the right number of days between two dates.

If I use DateDiff function it disregards the fact that there are weekend days in the calendar.

If I use Datesbetween function to count the rows in the Date table filtering out weekend days, it works fine only if start date is less then the end date. 

I have a situation where start date can be later than the supposedly end date (bad data, i guess).

Is there a work around to count the number of days between two dates (positive or negative) AND count only weekdays?

[v-easonf-msft · Accepted solution]

Hi， @Anonymous 

You need to created  calculated column Is_WorkDay =1 or 0 to indicate if its a workday  or not in your calendar table. 

Is_workday = IF( NOT WEEKDAY('Calendar'[Date],2)   in {6,7},1,0) 

To avoid the situation where the start date is greater than the end date，you can create a calculated column as below in you fact table (here we set two variables "max1"  and "min1" to get the date in the table)

_Workdays = 
VAR max1 =
    MAX ( 'Table'[StartDate], 'Table'[EndDate] )
VAR min1 =
    MIN ( 'Table'[StartDate], 'Table'[EndDate] )
RETURN
    CALCULATE (
        SUM ( 'Calendar'[Is_workday] ),
        ALL ( 'Calendar' ),
        DATESBETWEEN ( 'Calendar'[Date], min1, max1 )
    )

Best Regards,
Community Support Team _ Eason

[amitchandak]

@Anonymous , Check the second page work day diff

https://www.dropbox.com/s/y47ah38sr157l7t/Order_delivery_date_diff.pbix?dl=0

[Anonymous]

@Anonymous Please take a look at this- https://www.sqlbi.com/articles/counting-working-days-in-dax/

Hope it helps.