How to find second difference between two dates in the same column

Hi Anonymous ,

You could try to add an index column and use the function of DATEDIFF to calculate. I created a calculated column to implement it that you can have a try.

let
    Source = Excel.Workbook(File.Contents("C:\Users\xueding\Desktop\DateTime.xlsx"), null, true),
    Sheet2_Sheet = Source{[Item="Sheet2",Kind="Sheet"]}[Data],
    #"Promoted Headers" = Table.PromoteHeaders(Sheet2_Sheet, [PromoteAllScalars=true]),
    #"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"DateTime", type datetime}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 1, 1)
in
    #"Added Index"

Column = var last = CALCULATE(MAX('Table'[DateTime]),FILTER('Table','Table'[Index] =EARLIER( 'Table'[Index]) -1))
return
DATEDIFF(last,MAX('Table'[DateTime]),SECOND)

Best Regards,

Xue Ding

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