Re: comparing nulls

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От Christopher Browne
Тема Re: comparing nulls
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Msg-id m3oesybo4k.fsf@wolfe.cbbrowne.com
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Ответ на comparing nulls  (Kenneth Gonsalves <lawgon@thenilgiris.com>)
Список pgsql-sql
Centuries ago, Nostradamus foresaw when lawgon@thenilgiris.com (Kenneth Gonsalves) would write:
> On Tuesday 20 January 2004 19:26, Chris Bowlby wrote:
>>  Under 7.3.x this option was removed, you need to test via:
>>
>>  SELECT * from table where field IS NULL;
> thanx - works in both 7.1 and 7.3 - why do these guys keep fooling around 
> with these thangs?

Because there is a desire to have PostgreSQL conform with public
standards such as SQL-1999.  

The use of "IS NULL" conforms with SQL standards; the use of "= NULL"
does not.
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