Create Variable to know if value is within table column

[jaryszek]

Hi,

i have table with column "Col3" and i can have there nulls or some string. 

And what i want to check if in Col3 there is everywhere "null" and put it into variable. 

Something like if Col3.Contains only nulls then 1 else 0. (so if 1 row is different than null - put 0). 

How can i do this? 
I am using Power Query, not power BI. 

Please help,
Jacek

[AlexisOlson · Accepted solution]

You can add a custom column that references the entire column by writing #"Previous Step Name"[Col3].

if List.NonNullCount(#"Previous Step Name"[Col3]) = 0 then 1 else 1

Replace #"Previous Step Name" with the appropriate reference (e.g. it might be #"Changed Type" or Source or #"Filtered Rows").

[jaryszek]

Thank you!!

Jacek