Help with the Dax measure to compare the dates.

[Anonymous]

Hello all,

Good morning!

I have a table like this :

I just need to compare the Start dates and the previous end dates and display a result.

Here in this example -

For row number 2 - I would compare Jan 10 and Feb 1(1st end date) and display a result.

For row number 3 - I would compare Jan 10 with Jan 15 and Feb 1(1st and 2nd end date) and display the result.

As you can I should compare a start date with the previous end dates.

Looking forward to your help.

Thanks

[v-eachen-msft · Accepted solution]

Hi @Anonymous ,

At first, you need to add an index column in the query editor.

Then you could create a new column to compare the dates.

Diff =
VAR a =
    CALCULATE (
        FIRSTNONBLANK ( 'Table'[End], 1 ),
        FILTER ( 'Table', 'Table'[Index] = EARLIER ( 'Table'[Index] ) - 1 )
    )
RETURN
    DATEDIFF ( 'Table'[Start], a, DAY )

[parry2k]

@Anonymous when you said compare, what does that means? What output you want? You probably need to add index column to compare with previous rows but if you provide more details, it will help to get you the solution.