without the changes I could not show a true indication of multiple refer-
ence modeling using the MODEL clause. The other problem is that merg-
ing the new columns into the location entity would require updating all the
fact tables, which is not helpful for data warehouse performance. So I added
data outside of the established dimensional-fact entity structure created for
the existing data warehouse database.
Now we can add a reference model to the MODEL clause of one of
the queries we used before. The following script segments contain a single
reference model. This first segment has two columns, one for USD (U.S. ...
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