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svishwanathan's avatar
svishwanathan
Helper III
8 years ago
Solved

Power Query Syntax

Hello

 

I am trying to write some queries in M and have not found much success.

 

I have a column with years ranging from 1985 to 2026. I want to find the min year and also the relative year (which is the year in the row relative to min year which is 1985)

 

When I write LIst.Min({[Calendar.Year]}), I get the correct result 1985 but when I expand my query it returns incorrect value

 

[Calendar.Year]-(List.Min({[Calendar.Year]}), it returns 0 on all rows. I want that if the row has 1987 as year number then teh relative year shoudl be 2.

When I write [Calendar.Year]-1985, I get the correct value 2

 

I want to use List.Min instead of harcoding the min year

 


Swati

Need Help

4 Replies

  • MarcelBeug's avatar
    MarcelBeug
    Community Champion
    8 years ago

    List.Min({[Calendar.Year]}) just returns the minimum Calendar.Year of each rows Calendar.Year, in other words: just the value of each rows Calendar.Year value.

     

    Instead, you must use the minimum value of the entire table column.

     

    Example query:

     

    let
    Source = #table(type table[Calendar.Year = Int64.Type],List.Zip({{1985..2020}})),
    MinYear = List.Min(Source[Calendar.Year]),
    #"Added Custom" = Table.AddColumn(Source, "WrongCode", each [Calendar.Year] - List.Min({[Calendar.Year]})),
    #"Added Custom1" = Table.AddColumn(#"Added Custom", "CorrectCode", each [Calendar.Year] - MinYear)
in
    #"Added Custom1"
    • svishwanathan's avatar
      svishwanathan
      Helper III
      8 years ago

      Thanks Marcel

       

      I will try this but I was wondering that instead of getting the Advanced Editor and tweaking hte code, can i write it as custom column

       

      when I edit my query..

       

      Please let me know if I am not using the correct language and using M incorrectly here

       


      Swati