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Hi,
I am having a strange problem in the query editor (in Power BI). I want to add a new column that is the SUM of two columns in the same table:
It's really strange, if the formula for PASok is just a SUM of the other 2 columns that have some values, how can the new column only return null values? any idea what can be going on here?
Thank you very much
Solved! Go to Solution.
The + operator is returning a null because the [PAS] field is null ( number + null = null). This behavior is standard for all operators within PQ (+,-,/,*) and sql. You can override this behavior with List.Sum. List.Sum ignores nulls by definition.
List.Sum( { [Services Proactive], [PAS] } )
This could be achieved simply by coalesce operator ??
let
Source = #table(type table[A=number, B=nullable number], List.Zip({ List.Transform(List.Random(20,1), each Number.Round(_, 2) * 100) , List.Repeat({null}, 20) })),
Ad_Sum = Table.AddColumn(Source, "Sum", each [A] + ([B] ?? 0), type number)
in
Ad_Sum
The + operator is returning a null because the [PAS] field is null ( number + null = null). This behavior is standard for all operators within PQ (+,-,/,*) and sql. You can override this behavior with List.Sum. List.Sum ignores nulls by definition.
List.Sum( { [Services Proactive], [PAS] } )
Thanks!
Ok, thank you very much.