Difference between two dates in two lines using Direct Query

[Anonymous]

Hi guys.

Almost 2 years ago I did this question here and I received a brilliant solution from the colleague @Zubair_Muhammad :

DIAS_ENTRE_ESTADOS = 
VAR Previous_Date =
    MINX (
        TOPN (
            1,
            FILTER ( HISTORICO, [ID] = EARLIER ( [ID] ) && [DATA] < EARLIER ( [DATA] ) ),
            [DATA], DESC
        ),
        [DATA]
    )
RETURN
    IF( Previous_Date && NOT [ESTADO] = "01", DATEDIFF ( Previous_Date, [DATA], DAY), 0)

I was using "Import" and everything was fine.

Now I'm doing the something, but by a "Direct Query" connection and I'm receiving a strange message:

"EARLIER / EARLIEST references a previous row context that does not exist."

I studied and made research, but I didn't find information about it.

Could anyone help me?

Regards.

[amitchandak]

@Anonymous , if you are viewing by date then try like below. All with date table

current Day =SUM(Sales[Sales Amount])

Last Day Non Continous = CALCULATE(sum('order'[Qty]),filter(all('Date'),'Date'[Date] =MAXX(FILTER(all('Date'),'Date'[Date]<max('Date'[Date])),Table['Date'])))
Day behind Sales = CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],-1,Day))

Other option

This Day = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Date]=max('Date'[Date])))
Last Day = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Date]=max('Date'[Date])-1))

Refer my blog for direct query : https://community.powerbi.com/t5/Community-Blog/Decoding-Direct-Query-in-Power-BI-Part-1-Time-Intelligence-in/ba-p/922885

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 :
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions
https://www.archerpoint.com/blog/Posts/creating-date-table-power-bi
https://www.sqlbi.com/articles/creating-a-simple-date-table-in-dax/

See if my webinar on Time Intelligence can help: https://community.powerbi.com/t5/Webinars-and-Video-Gallery/PowerBI-Time-Intelligence-Calendar-WTD-YTD-LYTD-Week-Over-Week/m-p/1051626#M184


Appreciate your Kudos.

[Anonymous]

Hi @amitchandak .

Thanks for your message.

The situation is: there is a register and this register has status changes.

I need to calculate the time between those changes. One by one.

Regards.

[Greg_Deckler]

@Anonymous  EARLIER is not supported in DirectQuery:

https://docs.microsoft.com/en-us/analysis-services/tabular-models/dax-formula-compatibility-in-directquery-mode-ssas-2016?view=asallproducts-allversions

Thus, I would do this:

DIAS_ENTRE_ESTADOS = 
VAR CurrentID = [ID]
VAR CurrentData = [DATA]
VAR Previous_Date =
    MINX (
        TOPN (
            1,
            FILTER ( HISTORICO, [ID] = CurrentID && [DATA] < CurrentData ),
            [DATA], DESC
        ),
        [DATA]
    )
RETURN
    IF( Previous_Date && NOT [ESTADO] = "01", DATEDIFF ( Previous_Date, [DATA], DAY), 0)

[Anonymous]

Hi, @Greg_Deckler ,

Thanks a lot for your message. I didn't find that doc. 

It didn't work. I received the message: "The value for 'ID' cannot be determined" referring to the line "VAR CurrentID = [ID]".

Then I tried to put the table name, HISTORICO[ID], but it didn't work too.

Regards.

[Greg_Deckler]

@Anonymous - Is this a column or a measure? I was just going off of your formula. I cannot fathom why you would be able to use the column references in below formula but not in my formula unless you are trying to create this column in a different table? Hard to tell without having actually seen your data. 

DIAS_ENTRE_ESTADOS =
VAR Previous_Date =
MINX (
TOPN (
1,
FILTER ( HISTORICO, [ID] = EARLIER ( [ID] ) && [DATA] < EARLIER ( [DATA] ) ),
[DATA], DESC
),
[DATA]
)
RETURN
IF( Previous_Date && NOT [ESTADO] = "01", DATEDIFF ( Previous_Date, [DATA], DAY), 0)

[Anonymous]

Hi, @Greg_Deckler .

It is a measure.

I'm creating it in the table HISTORICO itself.

But I did another test: I put the "[" and the Power BI Desktop offers to me just model's measures, not a field.

When I put the table name, "HISTORICO", it doesn't offer a field.

Regards,

Emanuel

[Greg_Deckler]

@Anonymous - Right, in measures when you reference a column it must be wrapped in an aggregator like SUM, AVERAGE, MIN, MAX, etc.

[Anonymous]

Hi @Greg_Deckler

I didn't understand.

I said that I tried your first solution putting in a column and didn't work because MINX is not allowed in Direct Query.

DIAS_ENTRE_ESTADOS = 
VAR CurrentID = [ID]
VAR CurrentData = [DATA]
VAR Previous_Date =
    MINX (
        TOPN (
            1,
            FILTER ( HISTORICO, [ID] = CurrentID && [DATA] < CurrentData ),
            [DATA], DESC
        ),
        [DATA]
    )
RETURN
    IF( Previous_Date && NOT [ESTADO] = "01", DATEDIFF ( Previous_Date, [DATA], DAY), 0)

Regards,

[Greg_Deckler]

MINX is supported in measures. https://docs.microsoft.com/en-us/analysis-services/tabular-models/dax-formula-compatibility-in-direc...

What I am saying, is if this is a measure you need to wrap column aggregations in an aggregator:

DIAS_ENTRE_ESTADOS = 
VAR CurrentID = MAX([ID])
VAR CurrentData = MAX([DATA])
VAR Previous_Date =
    MINX (
        TOPN (
            1,
            FILTER ( HISTORICO, [ID] = CurrentID && [DATA] < CurrentData ),
            [DATA], DESC
        ),
        [DATA]
    )
RETURN
    IF( Previous_Date && NOT [ESTADO] = "01", DATEDIFF ( Previous_Date, [DATA], DAY), 0)

[Anonymous]

I knew it, but I said that in my original model was a column, not a measure (was my fault).

But as a measure, it didn't work too, as I told before.

So, the issue persists.

Regards.

[Greg_Deckler]

@Anonymous Well if it is a measure, just do this:

DIAS_ENTRE_ESTADOS = 
VAR CurrentID = MAX([ID])
VAR CurrentData = MAX([DATA])
VAR Previous_Date =
    MINX (
        TOPN (
            1,
            FILTER ( HISTORICO, [ID] = CurrentID && [DATA] < CurrentData ),
            [DATA], DESC
        ),
        [DATA]
    )
RETURN
    IF( Previous_Date && NOT [ESTADO] = "01", DATEDIFF ( Previous_Date, [DATA], DAY), 0)

[Anonymous]

Hi @Greg_Deckler!

Thanks a lot for your help.

Some information:

1. I tried to use this solution, but it returns an error on the last line:

"The value for 'DATA' cannot be determined. Either the column doesn't exist, or there is no current row for this column."

2. I checked again the old model, based on "Import", and I realized that I didn't create a column, but a measure instead of. Sorry.

Then, I tried your first solution again in a column, but I received a message saying that I can't use MINX on Direct Query.

I'm doing research, and I'm starting to believe that I can't do it using DAX on Direct Query.

On the other hand, I've read that EARLY just can be used on measures.

Complicated.

[amitchandak]

@Anonymous , Can you share sample data and sample output in a table format?

I will try to load to SQL server and try in direct query mode.

Thinking if Rank can help us to get the last record

[Anonymous]

Hi @amitchandak 

Thanks for your help.

Follow a link to a sample.

If you want to take a look at it too, @Greg_Deckler , please be my guess.

For security reasons, I'll need to delete it in 24 hours.

https://1drv.ms/u/s!Alj4o2gZuCvog9sxJwEZ5g56FeDmyg?e=U25u2z

Regards.

[amitchandak]

@Anonymous , I downloaded. In case I did not back with the solution. Mark me again on topic update