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Helper V

## Calculate difference between previous date of same column using DAX

Hi All,

I have a requirement to calculate the difference between date of the current line to the previous line of the same column.

 Protocol Received Status Date A 6/30/2022 Assigned 11/7/2022 A 6/30/2022 In-Progress 1/18/2023 A 6/30/2022 Pre-Review 2/6/2323 A 6/30/2022 Agenda 2/6/2023 A 6/30/2022 Pre-Review 2/15/2023 B 7/10/2023 Assigned 7/15/2023 B 7/10/2023 In-Progress 7/15/2323 B 7/10/2023 Agenda 8/1/2023 B 7/10/2023 Pre-Review 8/10/2023 B 7/10/2023 Pre-Review 8/15/2023

Expected Output:

 Protocol Received Date Status Effective Date No. of days A 6/30/2022 Assigned 11/7/2022 130 A 6/30/2022 In-Progress 1/18/2023 72 A 6/30/2022 Pre-Review 2/6/2023 19 A 6/30/2022 Agenda 2/6/2023 0 A 6/30/2022 Pre-Review 2/15/2023 9 B 7/10/2023 Assigned 7/15/2023 5 B 7/10/2023 In-Progress 7/15/2023 0 B 7/10/2023 Modified 8/1/2023 17 B 7/10/2023 Pre-Review 8/10/2023 9 B 7/10/2023 Modified 8/15/2023 5

1. First value of a group will be the received date minus effective date

2. The other values will be difference from the previous date of the effective date column.

I followed the blog below but this is not working when the dates are same as well the status are getting aggregated instead of showing it separately.

DAX Fridays! #85: Difference between dates in the same column

Could someone pleas advise how this can be solved using DAX.

Thank you.

1 ACCEPTED SOLUTION
Community Support

Hi @POSPOS

You can add a index column in power query first and apply it

Then create a calculated column

``````Column = var a=FILTER('Table',[Protocol]=EARLIER('Table'[Protocol]))
var b=MINX(FILTER(a,[Date]=MINX(a,[Date])),[Index])

Output

Best Regards!

Yolo Zhu

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

3 REPLIES 3
Community Support

Hi @POSPOS

You can add a index column in power query first and apply it

Then create a calculated column

``````Column = var a=FILTER('Table',[Protocol]=EARLIER('Table'[Protocol]))
var b=MINX(FILTER(a,[Date]=MINX(a,[Date])),[Index])

Output

Best Regards!

Yolo Zhu

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

Super User

Interval days.pbix

An index column is added to differentiate duplicated dates.

 Expertise = List.Accumulate(        {Days as from Today},        {Skills and Knowledge},        (Current, Everyday) => Current & Day.LeanAndPractise(Everyday))

Helper V

@ThxAlot  - Have you created index using DAX? Is there a way I can create index column using DAX.
Could you share you pbix pls.