Hi all,
a customer asked me about anti-joins. A left anti join, to be more precise:
"A left anti join : This join returns rows in the left table that have no matching rows in the right table."
(https://mode.com/blog/anti-join-examples/)
I could not figure how to do this in the interface (neither JOIN nor Query Builder).
Could somebody please enlighten me? 
Thanks,
Florian
