Re: Retrieving NULL records - Mailing list pgsql-novice

Shouldn't  = NULL  be considered a syntax error ?


Tom Lane <tgl@sss.pgh.pa.us> schrieb am 29.07.2003, 07:41:15:
> "psql novice"  writes:
> > stock=> select * from stock where qty = NULL;
>
> The correct incantation is
>
>  select * from stock where qty IS NULL;
>
> Ordinary comparisons involving NULL always fail (or more accurately,
> return NULL).  You have to use the special "is null" operator instead.
>
>             regards, tom lane
>
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