Calculate End Time to use the Start Time of the event for the same unit

[jingxiawang]

Hi,

I'm looking for a DAX to calculate below End Time.

Here is the example:

Unit                              Start Time                               End Time

Unit 1                           1/1/2022 7:00:00am

Unit 1                           1/1/2022 7:05:00am

Unit 2                            1/1/2022 7:00:00am

Unit 2                            1/1/2022 7:10:00am

• Start Time: The table data has the start time
• End Time: Needs to be calculated, I need to build the logic to look at the same unit, have the End equals to the Start of the next event for the same unit.

If there’s no other event for the same unit, use the last Power BI dataset refresh time stamp as the End.

If the two events for the same unit spans different months, use the midnight time stamp 00:00 on the last day of the month as the End for the 1st event of the two events.

Can anyone help me with the DAX to achieve this?

[jingxiawang]

Thanks, Amit. It worked perfectly to handle the 1st part of the calculation. But it still does not handle below logic:

•  If there’s no other event for the same unit, use the last Power BI dataset refresh time stamp as the End.
• If the two events for the same unit spans different months, use the midnight time stamp 00:00 on the last day of the month as the End for the 1st event of the two events.

Is there anyway we can include these two logic in the DAX?

[amitchandak]

@jingxiawang , a new column

minx(filter(Table, [Unit] = EARLIER([Unit]) && [Start Time] > earlier([[Start Time]) ),[Start Time])

or

coalesce(minx(filter(Table, [Unit] = EARLIER([Unit]) && [Start Time] > earlier([[Start Time]) ),[Start Time]), [Start Time])

[jingxiawang]

Thanks, Amit. It worked perfectly to handle the 1st part of the calculation. But it still does not handle below logic:

•  If there’s no other event for the same unit, use the last Power BI dataset refresh time stamp as the End.
• If the two events for the same unit spans different months, use the midnight time stamp 00:00 on the last day of the month as the End for the 1st event of the two events.

Is there anyway we can include these two logic in the DAX?

[v-stephen-msft · Accepted solution]

Hi @jingxiawang ,

Please try this calculated column

End Time =
VAR _next =
    MAXX (
        FILTER (
            'Table',
            [Unit] = EARLIER ( 'Table'[Unit] )
                && [Start Time] > EARLIER ( 'Table'[Start Time] )
        ),
        [Start Time]
    )
VAR _last =
    MAXX (
        FILTER (
            'Table',
            [Unit] = EARLIER ( 'Table'[Unit] )
                && [Start Time] < EARLIER ( 'Table'[Start Time] )
        ),
        [Start Time]
    )
RETURN
    IF (
        ISBLANK ( _next ),
        IF (
            DATEDIFF ( _last, [Start Time], MONTH ) > 0,
            EOMONTH ( [Start Time], 0 ),
            NOW ()
        ),
        _next
    )

Here's the results:

Best Regards,

Stephen Tao

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