Relationship: Star schema for multiple fact table

[KeithChu]

Dear all,

I have two fact table (Sales Table, Gift Table) and they have common look up dimension table (Customer, Product, Calender, etc).

I would like to filter out dimension based on fact, like "find customer who has bought certain amount of product A while received gift before'. This, I believe, would require a bidirectional filtering. And when I change to bidirection, Power BI would not allow it, saying there is ambigious filtering path.

My current solution would be disable/switch to "single" relationship when needed. Can you guys share your experience on design the data structure with multiple fact table? Thank you.

[Anonymous]

A schema can have one or more facts, but these facts are not linked by any key relationship. It is best practice not to join fact tables in a single query.Please refer these two very good articles:

Three ways to drill across by Chris Adamson

and

Should of the Warehouse - Drilling Across by Ralph Kimball

(from Stack overflow)

[v-yuezhe-msft]

@KeithChu,

Please check my reply in the similar thread below. If you still have questions, please share a screenshot about your relationships in the data model.

https://community.powerbi.com/t5/Desktop/Data-model-loop-cant-point-2-transaction-dates-to-DateTable...

Regards,
Lydia