topic DAX give different outputs when I expect the same in DAX Commands and Tips

DAX give different outputs when I expect the same

KristinG — Thu, 19 Jun 2025 11:41:17 GMT

Hi! I need som help here

Value from selected date =

CALCULATE(

SUM('Table1'[AMOUNT]),

ALL('Calendar')

'Calendar'[DateKey] > MAX('Calendar'[DateKey]))

Value from selected date in prev year =

VAR CurrentMaxDate = MAX('Calendar'[DateKey])

VAR StartDate = EOMONTH(CurrentMaxDate, -12)

RETURN

CALCULATE(

SUM(Table1[AMOUNT]),

ALL('Calendar'),

'Calendar'[DateKey] > Startdate)

The measures shoud give the exact same output if I enter May 2024 in the first and may 2025 in the last - but there is a sliight difference.

Value from selected date

Value from selected date in prev year

Help me understand why there is a difference!

Re: DAX give different outputs when I expect the same

FBergamaschi — Thu, 19 Jun 2025 11:59:00 GMT

Hi,

EOMONTH expectes a date as first input. I do not know what data type is your datekey column.

I tried this for the second measure

VAR CurrentMaxDate = MAX('Calendar'[Date])

VAR StartDate = EOMONTH(CurrentMaxDate, -12)

RETURN

CALCULATE(

SUM(Sales[SalesAmount]),

ALL('Calendar'),

'Calendar'[Date] > Startdate
)

and it works perfectly, but I used a date column of date format. So either you use a column like that or you convert the datekey into a date with the DATE DAX Function in combination with LEFT, MID, RIGHT

If this helped please mark this as a solution and give kudos

Thanks

Best

Re: DAX give different outputs when I expect the same

v-venuppu — Fri, 20 Jun 2025 08:34:02 GMT

Hi KristinG ,

Thank you for reaching out to Microsoft Fabric Community.

Thank you FBergamaschi for the prompt response.

I have created PBIX file using sample data, you can implement it using your data.Please go through the attached PBIX file for your reference.

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

Thank you.

Re: DAX give different outputs when I expect the same

v-venuppu — Mon, 23 Jun 2025 07:30:34 GMT

Hi KristinG ,

I wanted to check if you had the opportunity to review the information provided.If the response has addressed your query, please accept it as a solution, so other members can easily find it.

Thank you.

Re: DAX give different outputs when I expect the same

KristinG — Mon, 23 Jun 2025 07:36:35 GMT

Hi,
Thanks for your reply!
Its not a data type issue, 'Calendar'[DateKey] is date format

Re: DAX give different outputs when I expect the same

KristinG — Mon, 23 Jun 2025 07:40:08 GMT

Hi,

Thanks for your reply!

Your file is unfortunately showing the exact same value no matter what YearMonth I filter on, so a its a bit hard to see if ot actually solves the problem..

Re: DAX give different outputs when I expect the same

v-venuppu — Tue, 24 Jun 2025 13:00:55 GMT

Hi KristinG ,

can you please share the exact sample data and expected output , so that it will be helpful for us to do some workarounds to solve the issue.

Thank you.

Re: DAX give different outputs when I expect the same

v-venuppu — Fri, 27 Jun 2025 05:51:23 GMT

Hi KristinG ,

May I ask if you have resolved this issue? If so, please mark the helpful reply and accept it as the solution. This will be helpful for other community members who have similar problems to solve it faster.

Thank you.

Re: DAX give different outputs when I expect the same

KristinG — Fri, 27 Jun 2025 07:00:41 GMT

Hi!

I think its solved, but its not due to any of the reasons listed below. Thank you for your support.

Re: DAX give different outputs when I expect the same

v-venuppu — Fri, 27 Jun 2025 08:25:54 GMT

Hi KristinG ,

Great to hear that it's solved from your end! Could you please share the solution? It would be really helpful for others in the community who might be facing similar issues and can address them quickly. Also, I would suggest accepting your approach as the solution so that it can benefit others as well.

Thank you.

Re: DAX give different outputs when I expect the same

v-venuppu — Mon, 30 Jun 2025 08:41:46 GMT

Hi KristinG ,

Can you please share the solution and accept it as solution.This will be helpful for other community members who have similar problems to solve it faster.

Thank you.