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Home -> Community -> Usenet -> comp.databases.theory -> Re: On view updating
"mAsterdam" <mAsterdam_at_vrijdag.org> wrote in message news:41555dfa$0$78279$e4fe514c_at_news.xs4all.nl...
> If there is no assertion having a value for X, the constraint
> is not violated.
From the discussion on NULLS:
"I'll have a cup of coffee without cream, please."
"We're all out of cream."
"In that case, I'll have a cup of coffee without milk." Received on Sat Sep 25 2004 - 07:10:13 CDT
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