Need Help! Calculations based on Date Filters

Hi, Anonymous 

Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.

Table:

Calendar(a calculated table):

Calendar = CALENDARAUTO()

There is no relationship between two tables. You may create a measure as below.

Result = 
var _minslicerdate = CALCULATE(MIN('Calendar'[Date]),ALLSELECTED('Calendar'))
var _maxslicerdate = CALCULATE(MAX('Calendar'[Date]),ALLSELECTED('Calendar'))
var tab = 
ADDCOLUMNS(
    'Table',
    "Result",
    var _startdate = [Start Date]
    var _finishdate = [Finish Date]
    return
    SWITCH(
         TRUE(),
        _startdate>=_minslicerdate&&_finishdate<=_maxslicerdate,
        DATEDIFF(_startdate,_finishdate,DAY),
        _startdate<_minslicerdate&&_finishdate>=_minslicerdate&&_finishdate<=_maxslicerdate,
        DATEDIFF(_minslicerdate,_finishdate,DAY),
        _startdate<_minslicerdate&&_finishdate>_maxslicerdate,
        DATEDIFF(_minslicerdate,_maxslicerdate,DAY),
        _startdate>=_minslicerdate&&_startdate<=_finishdate&&_finishdate>_maxslicerdate,
        DATEDIFF(_startdate,_maxslicerdate,DAY)
    )
)
return
SUMX(
    tab,
    [Result]
)

Then you need to use the date column from 'Calendar' table to filter the result.

Best Regards

Allan

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