Groups > comp.databases.ms-sqlserver > #531

Re: SSE 2008: Check Clause Question

From	Erland Sommarskog <esquel@sommarskog.se>
Newsgroups	comp.databases.ms-sqlserver, microsoft.public.sqlserver.programming
Subject	Re: SSE 2008: Check Clause Question
Date	2011-07-15 10:58 +0200
Organization	Erland Sommarskog
Message-ID	<Xns9F236F9E88324Yazorman@127.0.0.1> (permalink)
References	<sgap171gthveuafqqeh17jgua36k2ihp49@4ax.com> <c359ded2-0cb7-47d4-9c68-8392ab12de48@j25g2000vbr.googlegroups.com> <s1ru17l3vu986nl8gcfmv80dmnhv6m50me@4ax.com>

Cross-posted to 2 groups.

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Gene Wirchenko (genew@ocis.net) writes:
>      Please expand "DRI".
 
Declarative Referential Integrity. That is constraints: CHECK and FOREIGN 
KEY constraints. And also PRIMARY KEY and UNIQUE constraints, although you 
cannot turn them off in SQL Server.

In SQL Server DEFAULT is also termed as a constraint, but that is a bit 
incorrect.

DRI should be seen in oppsition to RI checks implemented in triggrs.


-- 
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se

Links for SQL Server Books Online:
SQL 2008: http://msdn.microsoft.com/en-us/sqlserver/cc514207.aspx
SQL 2005: http://msdn.microsoft.com/en-us/sqlserver/bb895970.aspx

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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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