Left join in Power BI QNA

Hi all,

I  am experimenting with Power BI  Q&A.  However I couldn't figure out how to ask a proper question for illustrating Left JOIN scenario. 

Let me give you my sample scenario: I have [customer] and [customerproduct]  tables in my data set.   I would like to select [customers] who has "product-A"  but the don't have "product-B".

I have tried below phrases without any luck.

• Customers have A  but do not have B
• Customers who bought A  but not bought B
• Customers who haven't  B but have A

I appreciate if you can help me.

Thanks in advance

Mehmet