Answer / kalyani

According to Kimball

"Factless fact table are the preferred method of recording
the events in the DW where there is no natural numeric
measurement associated with the event. Factless fact tables
also are used to gurantee coverage"

Answer / kalyani

A factless fact is a fact table in which only primary keys
of the dimension tables present as foreign keys but no
individual fact clomuns.

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