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Hi there! I need some assistance with calculating a time difference between values in the same column. I have seen some other posts on the same topic, but they are not similar enough to my issue that i have been able to use them.


I have this extract from a large dataset


14.03.2024 22:0014.03.2024 22:00Arrival132Arr. JEBEL ALIJEBEL ALI
17.03.2024 04:4217.03.2024 04:42Arrival132Arr. ABU DHABIABU DHABI
21.03.2024 09:0021.03.2024 09:00Arrival132Arr. MUMBAIMUMBAI
29.03.2024 08:0029.03.2024 08:00Arrival132Arr. SINGAPORESINGAPORE
16.03.2024 23:5416.03.2024 23:54Departure132Dep. JEBEL ALIJEBEL ALI
18.03.2024 05:3018.03.2024 05:30Departure132Dep. ABU DHABIABU DHABI
22.03.2024 17:3022.03.2024 17:30Departure132Dep. MUMBAIMUMBAI
30.03.2024 10:4830.03.2024 10:48Departure132Dep. SINGAPORESINGAPORE


I would like to create a new column that calculates the time between Arrival and Departure if the VOYNUM and Position_Custom is the same. Would be great if anyone has any ideas!

Community Support
Community Support

Hi @palnarum ,


Create calculate column.


Time Difference =

VAR CurrentRowDate = 'Table'[EVENTDATE_LOCAL]

VAR CurrentVOYNUM = 'Table'[VOYNUM]

VAR CurrentPosition = 'Table'[Position_Custom]

VAR DepartureDate =





            'Table'[VOYNUM] = CurrentVOYNUM

            && 'Table'[Position_Custom] = CurrentPosition

            && 'Table'[REPORT_TYPE] = "Departure"

            && 'Table'[EVENTDATE_LOCAL] > CurrentRowDate




IF('Table'[REPORT_TYPE] = "Arrival" && NOT(ISBLANK(DepartureDate)),

    DATEDIFF(CurrentRowDate,DepartureDate,HOUR) / 24,






If your Current Period does not refer to this, please clarify in a follow-up reply.


Best Regards,

Clara Gong

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Thank you Clara

Unfortunately, I have a DirectQuery model and get the error message that the function CALCULATE is not allowed. I also tried to use the formula as a measure but it seems the issue is then that a single value for column 'EVENTDATE_LOCAL' in 'Table' cannot be determined. Not quite sure how to proceed.

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