Forum Discussion
DAX: doubt with expanded tables
Hi there,
We have an Answers table and a Customers table related through the CustomerKey column. Customers is on the one-side of the relationship and Answers on the many-side. We have the following:
CALCULATE (
DISTINCTCOUNT ( Customers[CustomerKey] ),
Answers,
Answers[AnswerKey] = 6
)
I was expecting the filtering on Answers[AnswerKey] would be visible in Customers, filtering the customers that appear in Answers with Answers[AnswerKey]=6. My reasoning is: we have Answers as expanded table in the filter arguments and further the filter on Answers[AnswerKey]. Answers gets filtered by Answers[AnswerKey] and then, as "filtered expanded table", has an effect on Customers. It does not have any effect from what I see in the results. Would you care to explain why this is so?
Many thanks
The filter you're placing on Answer[Key] = 6 does not propagate to the Customers table. Therefore the only filter propagating to the customer table is the answer table as it is (without Key = 6 ).
CALCULATETABLE will create a table filtered by Key = 6 which is then passed to CALCULATE as a filtered argument
The expanded version of Customers does not contain coulmns from the Answer table, unless bi-directional filter is activated, which i dont recommend
4 Replies
Hi AlB
The right measure in your case should be:
CALCULATE ( DISTINCTCOUNT ( Customers[CustomerKey] ), CALCULATETABLE( Answers, Answers[AnswerKey] = 6 ) )The filter you're placing on Answer[Key] = 6 does not propagate to the Customers table. Therefore the only filter propagating to the customer table is the answer table as it is (without Key = 6 ).
CALCULATETABLE will create a table filtered by Key = 6 which is then passed to CALCULATE as a filtered argument
The expanded version of Customers does not contain coulmns from the Answer table, unless bi-directional filter is activated, which i dont recommend
