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Nullology of empty strings

From: Morten <usenet_at_kikobu.com>
Date: 7 Jan 2003 03:51:27 -0800
Message-ID: <75db36f2.0301070351.3cd43474@posting.google.com> 





Hi. I'm curious about why the empty string '' IS NULL in Oracle databases. 
Is this a general convention? Where can I read up on the theory behind this?



I would like to find out why this is so, and what the theoretical foundations
are (relational calculus possibly?)



Thanks,



Morten
Received on Tue Jan 07 2003 - 05:51:27 CST












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