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bbbt123's avatar
bbbt123
Helper I
6 years ago
Solved

help with calculated column

Hello, I need help with a calculated column.   I have a table, call it "Table1" with unique values per category, see example below:

category value
a30
b40
c50

 

Then I have another table, call it "Table2" like the one below:

 

week numcategoryvalue
10a34
11b45
12a67
13b89

 

I have to create a new column in Table 2 where I add the corresponding value of Table 1 only once, only in the first row, not in each row. how can I achieve it in power bi?

  • I am thinking perhaps:

     

    Column in Table2 = 
      VAR __Category = [category]
      VAR __MinWeek = MINX(FILTER(ALL('Table2'),[category]=__Category),[week num])
    RETURN
      IF([week num] = __MinWeek,LOOKUPVALUE('Table1'[value],'Table1'[category],__Category),BLANK())

2 Replies

  • Create these two new columns in table 2

    Count = countx(filter(table2,table2[category]=earlier(table2[category]) && table2[week num] <=earlier(table2[week num])),table2[week num])
    
    from table 1 = maxx(filter(table1,table2[category]=(table1[category]) && table2[Count]=1),table1[value])

     

    Appreciate your Kudos.

  • Greg_Deckler's avatar
    Greg_Deckler
    Community Champion

    I am thinking perhaps:

     

    Column in Table2 = 
      VAR __Category = [category]
      VAR __MinWeek = MINX(FILTER(ALL('Table2'),[category]=__Category),[week num])
    RETURN
      IF([week num] = __MinWeek,LOOKUPVALUE('Table1'[value],'Table1'[category],__Category),BLANK())