Re: WWW/Internet 2009: 2nd CFP until 21 September

From: paul c <toledobythesea_at_oohay.ac>
Date: Thu, 13 Aug 2009 02:01:21 GMT
Message-ID: <RtKgm.38901$Db2.23520_at_edtnps83>



Mr. Scott wrote:
> "Bob Badour" <bbadour_at_pei.sympatico.ca> wrote in message
> news:4a82e4c7$0$23778$9a566e8b_at_news.aliant.net...
>> paul c wrote:
>>
>>> Mr. Scott wrote:
>>> ...
>>>
>>>> I'm confused.  What requirement are you referring to?  Are you referring 
>>>> to the requirement that nulls be eliminated or the fact that an order 
>>>> isn't an order without a delivery destination?  The referential cycle 
>>>> was a consequence of trying to eliminate nulls. ...
>> What cycle? And why would anyone care about a referential cycle? It's not 
>> like SQL hasn't had deferred checking for a decade or two.

>
> I think it's misleading to say that Sql has deferred checking. Both
> deferred constraints and subquery in check are optional features of the Sql
> standard. Neither Sql Server or DB2 support either. Oracle does support
> deferred constraint checking but not subqueries in check.
> ...

I gather you are no longer talking about sql, but about products. Received on Wed Aug 12 2009 - 21:01:21 CDT

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