Re: foreign key constraint versus referential integrity constraint

From: paul c <>
Date: Wed, 28 Oct 2009 20:54:42 GMT
Message-ID: <mc2Gm.50629$PH1.26494_at_edtnps82>

Tegiri Nenashi wrote:
> ... Is adding new view z (as a function of x and y) adding a
> constraint to the system?
> ...

I would say not exactly. More exactly it is adding another relation and constraining the resulting system (aka the resulting database). That is different from merely constraining an existing system/database. Received on Wed Oct 28 2009 - 21:54:42 CET

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