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> From: Booth Martin > > I am curious why you say this Joe? Every physical file record > can be accessed by relative record number See my reply to Chris. I'm pretty sure that RRN doesn't count because RRN isn't a data element in the row. You guys wuold have to ask Dr. Codd whether the RRN can be used as a "primary key" in his definition. My guess is it cannot. Your guess is as good as mine, of course. Joe
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