Υπολογισμός χρόνου σε DAX

--  DATEDIFF computes the delta between two dates, using different units of measure
--  YEAFRAC returns the delta as a fraction (in years) 
EVALUATE
VAR StartDate =  DATE ( 2011, 01, 01 )
VAR EndDate =    DATE ( 2012, 12, 15 )
RETURN
    {
        ( "DATEDIFF Year",     DATEDIFF ( StartDate, EndDate, YEAR ) ),
        ( "DATEDIFF Quarter",  DATEDIFF ( StartDate, EndDate, QUARTER ) ),
        ( "DATEDIFF Month",    DATEDIFF ( StartDate, EndDate, MONTH ) ),
        ( "DATEDIFF Day",      DATEDIFF ( StartDate, EndDate, DAY ) ),
        ( "Subtraction",       INT ( EndDate - StartDate ) ),
        ( "YEARFRAC",          YEARFRAC ( StartDate, EndDate ) )
    }

MeetingTimeMinsHours = 
VAR _all = SUMX( Committees_Meetings; Committees_Meetings[time_end] - Committees_Meetings[time_start] ) * 1
VAR _days  = INT( _all ) 
VAR _time = _all - _days 
RETURN  FORMAT( _time; "hh:mm")