Answer Posted / saj
A query that uses multiple facts from different underlying
tables is split into separate queries for
each underlying fact table. Each single fact query refers to
its respective fact table as well as to the
dimensional tables related to that fact table. Another query
is used to merge these individual queries
into one result set. This latter operation is generally
referred to as a stitched query. You know that
you have a stitched query when you see coalesce and a full
outer join.
A stitched query also allows IBM Cognos software to properly
relate data at different levels of
granularity
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