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sanimesa's avatar
sanimesa
Post Prodigy
8 years ago
Solved

FIRSTDATE and LASTDATE functions broken?

Has anything changed with the Firstdate and Lastdate functions in the May release?     I have a date slicer with the invoice date added to it. To display the slicer selection, I use the below meas...
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  • Anonymous's avatar
    Anonymous
    8 years ago

    HI sanimesa,

     

    I'm not so sure why firstdate and lastdate function not works on your side. (I test with last version without any issue)

    Can you please share pbix file to test?


    In addition, you can also try to use below formula to instead:

    Invoice Date Selected =
"Reporting Period: "
    & FORMAT (
        MINX ( ALLSELECTED ( InvoiceTable[InvoiceDate] ), [InvoiceDate] ),
        "MMMM DD, YYYY"
    )
    & " - "
    & FORMAT (
        MAXX (
            ALLSELECTED ( Reporting_JSG_ConsolidatedOrders[InvoiceDate] ),
            [InvoiceDate]
        ),
        "MMMM DD, YYYY"
    )

    Regards,

    Xiaoxin Sheng

  • Anonymous's avatar
    Anonymous
    8 years ago

    HI sanimesa,

     

    After checking your pbix file, I found it similar as @KHorseman said, 'firstdate' and 'lastdate' function not works if your date table contains duplicate records.


    I modify my formula and current it can works on your scenario, please take a look at below formula:

    Invoice Date Selected =
"Reporting Period: "
    & FORMAT (
        MINX ( VALUES ( Sheet2[InvoiceDate] ), [InvoiceDate] ),
        "MMMM DD, YYYY"
    )
    & " - "
    & FORMAT (
        MAXX ( VALUES ( Sheet2[InvoiceDate] ), [InvoiceDate] ),
        "MMMM DD, YYYY"
    )

     

    Regards,
    Xiaoxin Sheng

Anonymous's avatar
Anonymous
Not applicable
8 years ago

The error message is pretty clear. You can't use a column that contains the same date value multiple times in these functions. They're meant to be used on a date dimension table. If you're using a fact table where the same date can be repeated more than once, you should use MIN and MAX instead.

sanimesa's avatar
sanimesa
Post Prodigy
8 years ago

Anonymous I have duplicate dates in both sets in my example, one is working while the other is not. Additionally, this used to work before on the same dataset. I guess I will try and use some other method but I have a feeling the May upgrade caused it. 

  • Anonymous's avatar
    Anonymous
    Not applicable
    8 years ago

    HI sanimesa,

     

    After checking your pbix file, I found it similar as @KHorseman said, 'firstdate' and 'lastdate' function not works if your date table contains duplicate records.


    I modify my formula and current it can works on your scenario, please take a look at below formula:

    Invoice Date Selected =
"Reporting Period: "
    & FORMAT (
        MINX ( VALUES ( Sheet2[InvoiceDate] ), [InvoiceDate] ),
        "MMMM DD, YYYY"
    )
    & " - "
    & FORMAT (
        MAXX ( VALUES ( Sheet2[InvoiceDate] ), [InvoiceDate] ),
        "MMMM DD, YYYY"
    )

     

    Regards,
    Xiaoxin Sheng

    • Anonymous's avatar
      Anonymous
      Not applicable
      8 years ago

      Sometimes FIRSTDATE and LASTDATE will appear to "work" on non-contiguous non-unique date columns if the dates selected just happen to lack overlaps that affect the calculation, or in some cases the error is small enough that you won't notice it. The fact that you've used them in the past just means you accidentally got away with it, not that it was the correct way to use them.

       

      Now, if you were to connect all of this to a date dimension and point those FIRSTDATE and LASTDATE formulas at that table's date column with a relationship to this table's date column, they should work as expected. If you want to stick with the table structure you're already using, use some variation of MIN/MAX/MINX/MAXX instead.

      • mohittimpus's avatar
        mohittimpus
        Helper V
        7 years ago
        #Confidence Range = CALCULATE(SELECTEDVALUE(MLPredictionsX[Confidence Range net]),LASTDATE(MLlnput[ProdDate]))
         
        In this I am not used the Min and Max in place of LastDate