Re: foreign key constraint versus referential integrity constraint
From: paul c <toledobythesea_at_oohay.ac>
Date: Thu, 22 Oct 2009 17:22:01 GMT
Message-ID: <Zw0Em.48972$Db2.14580_at_edtnps83>
Date: Thu, 22 Oct 2009 17:22:01 GMT
Message-ID: <Zw0Em.48972$Db2.14580_at_edtnps83>
Sampo Syreeni wrote:
> ... What we'd nowadays
> call "complex", "semistructured", "unstructured", "unconventional" or
> even "nasty" data was explicitly excluded by Codd from the very
> beginning.
> ...
He was dealing with structured data all along. What he excluded was two things i) unnecessary structure, ii) hidden structure. Received on Thu Oct 22 2009 - 19:22:01 CEST