Groups > comp.databases.ms-sqlserver > #520

Re: SSE 2008: Check Clause Question

From	--CELKO-- <jcelko212@earthlink.net>
Newsgroups	comp.databases.ms-sqlserver, microsoft.public.sqlserver.programming
Subject	Re: SSE 2008: Check Clause Question
Date	2011-07-14 07:12 -0700
Organization	http://groups.google.com
Message-ID	<c359ded2-0cb7-47d4-9c68-8392ab12de48@j25g2000vbr.googlegroups.com> (permalink)
References	<sgap171gthveuafqqeh17jgua36k2ihp49@4ax.com>

Cross-posted to 2 groups.

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On Jul 12, 3:12 pm, Gene Wirchenko <ge...@ocis.net> wrote:
> Dear SQL'ers:
>
>      Is there any way around the SQL glitch that a check condition
> will always succeed when the table is empty?
>
>      I do not want to have the first row be automatically accepted.
>
> Sincerely,
>
> Gene Wirchenko

Glitch? That is a law of logic; anything you say about non-existing
thigns is true. Look up "Existental import" in a text book on the
history of modern logic. And teh first row is not always accepted.

 I have some situations with self-references to avoid gaps in the
dates of a history that I start with CHECK() constraints off, insert a
first row, turn teh DRI back on and proceed to insert as usual.

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SSE 2008: Check Clause Question Gene Wirchenko <genew@ocis.net> - 2011-07-12 13:12 -0700
  Re: SSE 2008: Check Clause Question Erland Sommarskog <esquel@sommarskog.se> - 2011-07-12 23:56 +0200
    Re: SSE 2008: Check Clause Question Gene Wirchenko <genew@ocis.net> - 2011-07-12 15:47 -0700
      Re: SSE 2008: Check Clause Question Erland Sommarskog <esquel@sommarskog.se> - 2011-07-13 10:17 +0200
  Re: SSE 2008: Check Clause Question --CELKO-- <jcelko212@earthlink.net> - 2011-07-14 07:06 -0700
  Re: SSE 2008: Check Clause Question --CELKO-- <jcelko212@earthlink.net> - 2011-07-14 07:12 -0700
    Re: SSE 2008: Check Clause Question "Fred." <ghrno-google@yahoo.com> - 2011-07-14 08:22 -0700
    Re: SSE 2008: Check Clause Question Gene Wirchenko <genew@ocis.net> - 2011-07-14 15:26 -0700
      Re: SSE 2008: Check Clause Question Erland Sommarskog <esquel@sommarskog.se> - 2011-07-15 10:58 +0200
        Re: SSE 2008: Check Clause Question Gene Wirchenko <genew@ocis.net> - 2011-07-15 11:07 -0700
      Re: SSE 2008: Check Clause Question --CELKO-- <jcelko212@earthlink.net> - 2011-07-16 06:46 -0700

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