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Re: null != null ??? - Mailing list pgsql-general

From Tom Lane
Subject Re: null != null ???
Date
Msg-id 24759.1004113010@sss.pgh.pa.us
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In response to null != null ???  (Fran Fabrizio <ffabrizio@mmrd.com>)
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Fran Fabrizio <ffabrizio@mmrd.com> writes:
> Can someone smarter than me tell me what I am missing?

Comparisons involving NULL yield NULL.  Any book on SQL should
explain this ...

            regards, tom lane

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