Time differences between two date/time values in same column

Hi Anonymous ,

How about this?

1. Create a Rank column. Or, you can just add an Index column in Power Query Editor and then use this Index column instead of Rank column in the second expression.

Rank = RANKX('Table','Table'[Date/Time],,ASC,Dense)

2. Create a measure to show the datediff.

Measure = 
VAR PreDateTime =
    CALCULATE (
        MAX ( 'Table'[Date/Time] ),
        FILTER ( ALLSELECTED ( 'Table' ), 'Table'[Rank] = MAX ( 'Table'[Rank] ) - 1 )
    )
RETURN
    DATEDIFF ( PreDateTime, MAX ( 'Table'[Date/Time] ), SECOND )

Please close other unnecessary programs.

Best Regards,

Icey

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