Forum Discussion

Bryanna's avatar
Bryanna
Helper II
3 years ago
Solved

Calculating Date/Time difference

Hi,

I am trying to calculate the average between two dates/times using DAX. I am using the following formula and it is returning a negative number even though the difference is the same date and should be -0 day 1 hr 25 mins for the first highlighted example. What am i doing wrong?

 

duration_average3 =

VAR total_second =
AVERAGEX(
    '90 Day Order Patterns Time',
    DATEDIFF('90 Day Order Patterns Time'[Date Closed],'90 Day Order Patterns Time'[Date Requested to Ship],SECOND)
)

VAR DAXDay   =  INT(total_second/(24*60*60))
VAR DAXHours =  MOD(INT(total_second/(60*60)),24)
VAR DAXMin   =  MOD(INT(total_second/60),60)


RETURN DAXDay &" Day "& DAXHours &" Hour "& DAXMin &" Minute "

 

 

Thanks!

  • FreemanZ's avatar
    FreemanZ
    3 years ago

    hi Bryanna 
     

    try this:

     

    duration_average = 
VAR _seconds=
AVERAGEX(
    TableName,
    DATEDIFF( TableName[DateRequested], TableName[DateClosed], SECOND)
)
VAR _secondsABS = ABS(_seconds)
VAR _day = TRUNC(_secondsABS/(24*60*60))
VAR _hour = TRUNC( MOD(_secondsABS, 24*60*60)/(60*60))
VAR _minute = TRUNC( MOD(_secondsABS, 60*60)/60)
VAR _second = MOD(_secondsABS, 60)
RETURN
IF(
    _seconds<=0,
    _day&" Day "& _hour&" Hour "& _minute&" Minute "&_second&" Second Ahead",
    _day&" Day "& _hour&" Hour "& _minute&" Minute "&_second&" Second Delay"
)

     

     

    i tried with such data:

    DateClosedDateRequested
    9/10/2022 11:00:089/10/2022 15:00:00
    9/12/2022 11:00:089/12/2022 13:00:00
    9/14/2022 19:00:089/14/2022 13:00:00

     

    it worked like this:

     

     

    The tricky part is the behaviour of TRUNC/INT/MOD for negative values. Lemme try to depict it in Excel:

     

5 Replies

  • Bryanna's avatar
    Bryanna
    Helper II
    3 years ago

    Hi!

     

    I tried swapping as well but some still look odd. Still shows as a negative but they shipped it sooner than the requested ship date.

     

     

    • FreemanZ's avatar
      FreemanZ
      Super User
      3 years ago

      hi Bryanna 
       

      try this:

       

      duration_average = 
VAR _seconds=
AVERAGEX(
    TableName,
    DATEDIFF( TableName[DateRequested], TableName[DateClosed], SECOND)
)
VAR _secondsABS = ABS(_seconds)
VAR _day = TRUNC(_secondsABS/(24*60*60))
VAR _hour = TRUNC( MOD(_secondsABS, 24*60*60)/(60*60))
VAR _minute = TRUNC( MOD(_secondsABS, 60*60)/60)
VAR _second = MOD(_secondsABS, 60)
RETURN
IF(
    _seconds<=0,
    _day&" Day "& _hour&" Hour "& _minute&" Minute "&_second&" Second Ahead",
    _day&" Day "& _hour&" Hour "& _minute&" Minute "&_second&" Second Delay"
)

       

       

      i tried with such data:

      DateClosedDateRequested
      9/10/2022 11:00:089/10/2022 15:00:00
      9/12/2022 11:00:089/12/2022 13:00:00
      9/14/2022 19:00:089/14/2022 13:00:00

       

      it worked like this:

       

       

      The tricky part is the behaviour of TRUNC/INT/MOD for negative values. Lemme try to depict it in Excel:

       

  • Bryanna's avatar
    Bryanna
    Helper II
    3 years ago

    Hi,

     

    This looks much better thank you! I just removed the seconds portion since it had a very large number of decimal places.