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Question on using related function on virtual table

Hello Team,


I am playing around with Microsoft's sample Contoso Retail database and stuck with how the following expression works. 


Screenshot 2021-10-19 002600.png

 1. As first parameter to ADDCOLUMN'S function, I have used ALL(Sales) which is a virtual table. 

 2. All(Sales) doesn't have physical relationship with products table. 

 3. But I can use related function on All(Sales) to access the product[brand] column. 


However, if I substite ADDCOLUMN function's first paramemter to a table with subset of columns like the following, it produces an error stating that there is no relationship.

Screenshot 2021-10-19 003916.png


The codes are for my educational purposes and it wouldn't make much sense. 

What I am trying to understand is 

 1. related function works on the virtual table with all the columns and

 2. If I use only subset of columns for the virtual table, the related function does not work any more. 


I would really appreicate any help. 

Community Support
Community Support

Hi @dnjtdjq ,


Based on my test, even if you put all columns into ALL() function, it will also not work.





Best Regards,



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