Re: Violation of NOT NULL

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От Fran Fabrizio
Тема Re: Violation of NOT NULL
Дата
Msg-id 3CED3215.70308@mmrd.com
обсуждение исходный текст
Ответ на Re: Violation of NOT NULL  ("Wm. G. Urquhart" <wgu@wurquhart.co.uk>)
Список pgsql-general
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>>With that said if '' does != NULL then what does? Just NULL? In my book
>>NULL means undefined and IMHO you can't get more undefined than ''!
>>
To me, '' is very defined.  You're explicitly telling something to be
set to the empty string.  It has a definite value - "empty string".
 NULL implies that you have no information whatsoever to determine what
the value is.

That's just me. I was always bothered that Oracle did consider empty
strings to be NULLs.  =)

-Fran



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