Um, yes, probably need to update my Oracle reference manuals – I think the big 
fat paper one on my shelf may even refer to ANSI SQL89, which I suspect is 
pretty much what my head content is based on also. In any case, XOR doesn’t 
appear to be in the latest ANSI/ISO SQL standards I have access to (ANSI 2003), 
so this may be a MySQL-specific extension.


But however you slice it, XOR is the wrong solution for the problem at hand! ;)



Mike Ford,
Electronic Information Developer, Libraries and Learning Innovation,  
Leeds Metropolitan University, C507, Civic Quarter Campus, 
Woodhouse Lane, LEEDS,  LS1 3HE,  United Kingdom 
Tel: +44 113 812 4730




From: Ashley Sheridan [] 
Sent: 07 December 2009 12:26
To: Ford, Mike
Subject: RE: [PHP] Re: logic operands problem


On Mon, 2009-12-07 at 12:26 +0000, Ford, Mike wrote:

This is pretty much why SQL does not offer you the XOR operator!

Someone better tell the MySQL developers then...



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