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From: Jamie A Lawrence <jal@clueinc.net>
To: Andrew Sullivan <ajs@crankycanuck.ca>
Cc: pgsql-sql@postgresql.org
Subject: Re: Differentiate Between Zero-Length String and NULLColumn Values
Date: Tue, 30 Jan 2007 15:17:56 -0500
Message-ID: <9B53782A-CDF7-4117-9236-62D4926F7835@clueinc.net> (raw)
In-Reply-To: <20070130165503.GC32170@phlogiston.dyndns.org>
References: <20070130131334.GD31676@phlogiston.dyndns.org>
	<45BF584F.A3DD.0030.0@indicator.be>
	<20070130142332.GA31905@phlogiston.dyndns.org>
	<20070130113834.fa8d09e0.darcy@druid.net>
	<20070130165503.GC32170@phlogiston.dyndns.org>

Just a datapoint:

SQL*Plus: Release 10.1.0.3.0 - Production on Tue Jan 30 15:15:49 2007

Copyright (c) 1982, 2004, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> select * from dual where '' IS NULL;

D
-
X

SQL> select * from dual where '' = NULL;

no rows selected


-j



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  Subject: Re: Differentiate Between Zero-Length String and NULLColumn Values
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