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Of course, this all assumes that you are using Referential
(and other) constraints. After all, how else is it supposed
to know that the item number from the item master goes into
the order detail file?

Of course! Thanks for your help Rob. So if we have no constraints, the database map is not very interesting.
Could you explain a simple constraint so I can try it out? Would this be only applicable for DDL only or has DDS some kind of equivalent?

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