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cris1196's avatar
cris1196
Helper I
3 years ago
Solved

Replicate this SQL query in DAX

Hello everyone. I wanted to know if there was a way to replicate, in mesasures, the following SQL queries in DAX, so that it looks as similar as possible to this: Measure = var variable1 = select...
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  • tamerj1's avatar
    tamerj1
    3 years ago

    Hi cris1196 

    The following shall return unique count of customers. 

    Common Customers =
VAR T1 =
    CALCULATETABLE (
        VALUES ( 'Table'[Cutomer] ),
        'Table'[first_order] = "True",
        'Table'[YearMonth] = 202201
    )
VAR T2 =
    CALCULATETABLE (
        VALUES ( 'Table'[Cutomer] ),
        'Table'[Day] = 1,
        'Table'[YearMonth] = 202201
    )
RETURN
    COUNTROWS ( INTERSECT ( T2, T1 ) )
    New Customers =
VAR T1 =
    CALCULATETABLE (
        VALUES ( 'Table'[Cutomer] ),
        'Table'[first_order] = "True",
        'Table'[YearMonth] = 202201
    )
VAR T2 =
    CALCULATETABLE (
        VALUES ( 'Table'[Cutomer] ),
        'Table'[Day] = 1,
        'Table'[YearMonth] = 202201
    )
RETURN
    COUNTROWS ( EXCEPT ( T2, T1 ) )

     

cris1196's avatar
cris1196
Helper I
3 years ago

 

 

So if I create an array whose rows are [YearMonth] and columns are [Days] (or I can generate another table with generatedseries(0,12,1) for the months/periods):

that PBI automatically calculates these values, without the need to create several variables.

Just in case, if I didn't explain myself well: if I wanted "number of users with first order = true per day", I could do:

 

 


 I hope I have explained myself well, if not, I apologize and honestly I do not want to take up any more of your time: I already created all the variables I needed, this question is just an irrelevant extra curiosity.

Again, many thanks for your help 🙂

tamerj1's avatar
tamerj1
Community Champion
3 years ago

cris1196 
I was hopping that you explain what are trying to achieve not how are you trying to achieve it. However there is a chance that I correctly guessed your requirement. It could be much simpler than you might think. Please try

Common Customers =
VAR CurrentMonth =
    SELECTEDVALUE ( 'Table'[YearMonth] )
VAR T1 =
    CALCULATETABLE (
        VALUES ( 'Table'[Cutomer] ),
        'Table'[first_order] = "True",
        'Table'[YearMonth] = CurrentMonth - 1,
        ALL ( 'Table'[Day] )
    )
VAR T2 =
    VALUES ( 'Table'[Cutomer] )
RETURN
    COUNTROWS ( INTERSECT ( T2, T1 ) )
  • cris1196's avatar
    cris1196
    Helper I
    3 years ago

    I tried to put examples so I tried to explain it better. Thank you very much for your help