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Message Posted: Thu, 24 Jan 2008 @ 13:06:58 GMT


     
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Subj:   Re: Confusing of the 'NOT LIKE' logic
 
From:   Dieter Nöth

David Clough wrote:

  For what it's worth, whenever this type of confusing arises here at TNT I always recommend starting off with reversing the logic  


Of course you're right, but "NOT(a OR b)" translates to "NOT a and NOT b" and that's exactly what Ray wrote :-)

The only reason for missing rows in that case is three way logic involving NULLs. Adding "OR url_txt IS NULL" should solve it.


Dieter



     
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