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Vamshi2020's avatar
Vamshi2020
Helper II
5 years ago

Previous Month Dax Error

Hello Everyone ,

I have an issue using PreviousMonth DAX. Please help me.

 

I have a requirement to show current and Previous rate in Report. Previous Rate here refers to Previous Reporting Date. I have 10 Reporting Dates in my Report Jan to October .

So, i used below formula for calculating Prior rate.

 

Prior Rate= 
var a=PREVIOUSMONTH(ReportDate)
var b=calculate(sum(Rate), Report Date=a)
return 
b

But the issue is when i select max reporting Date i.e 10/31/2020 , iam getting error that "A Table of multiple values was supplied, whereas single value is expected". This issue is coming only for max Report Date i.e 10/31/2020

 

So, Please help me to solve this.

TIA

Need Help

2 Replies

  • amitchandak's avatar
    amitchandak
    Super User
    5 years ago

    Vamshi2020 ,  Try like

    Prior Rate=
    calculate(sum(Table[Rate]), PREVIOUSMONTH(Table[Report Date]))

     

    Prefer to use date table

    example

    MTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESMTD('Date'[Date]))
last MTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESMTD(dateadd('Date'[Date],-1,MONTH)))
last month Sales = CALCULATE(SUM(Sales[Sales Amount]),previousmonth('Date'[Date]))
this month =MTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESMTD(ENDOFMONTH('Date'[Date])))
last MTD (complete) Sales =  CALCULATE(SUM(Sales[Sales Amount]),DATESMTD(ENDOFMONTH(dateadd('Date'[Date],-1,MONTH))))
previous month value =  CALCULATE(sum('Table'[total hours value]),previousmonth('Date'[Date]))

     

    refer: https://www.youtube.com/watch?v=6LUBbvcxtKA

    Power BI — Month on Month with or Without Time Intelligence
    https://medium.com/@amitchandak.1978/power-bi-mtd-questions-time-intelligence-3-5-64b0b4a4090e

     

    To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :radacad sqlbi My Video Series Appreciate your Kudos.

  • v-jingzhang's avatar
    v-jingzhang
    Community Support
    5 years ago

    Hi Vamshi2020 

     

    Please refer to below remark of PREVIOUSMONTH() function and check when you select the max Report Date, whether your table has multiple Report Dates in its previous month? In the code 'var b=calculate(sum(Rate), Report Date=a)', the value after '=' is expected to be a single value.

     

     

    Kindly let me know if this helps.

     

    Community Support Team _ Jing Zhang
    If this post helps, please consider Accept it as the solution to help other members find it.