Answers on factless facts

Hi,
How does OBIEE, Answers in particular, cope with factless fact tables? The related dimensions would be linked to that factless fact in the pysical and BMM tier, but the factless fact would not be shown in the subject area.
When an user selects two or more dimensions linked through this factless fact, how would BI Server generate the query?
Is it recommended to have a least a dummy measure in that fact?
Thank you!

Hy,
I have an example here :
http://gerardnico.com/wiki/dat/obiee/bi_server/design/obiee_densification_design_preservation_dimension
I don't use a factless fact table but a densification process.
The techniques used are the same as it's based on the fact vertical partitioning.
http://gerardnico.com/wiki/dat/obiee/bi_server/design/fact_table/obiee_fact-based_partitioning_outer_joins
And you can see the two queries and the full outer join issued.
Success
Nico
And thanks Stijn (I didn't know the implict fact)

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  • Question was answered, now how do I delete this message??

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