@Anaisdg
I’m not sure I fully understand your question but I’m only selecting the qty field values from b1 hence the filter by “qty” _field.
I ran into the “measurement exists” and overcame that by selecting the _measurement from b2.
However, it returned
table has no _field column
Isn’t the _field the column generated by the map function as “_total_value” with the _value being the result of the calculation created as a result for every point?
