Обсуждение: RE: [GENERAL] Finding an empty field

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RE: [GENERAL] Finding an empty field

От
Michael J Davis
Дата:
       SELECT * FROM TABLE WHERE FIELD1 = ''; or
       SELECT * FROM TABLE WHERE FIELD1 IS NULL;



> -----Original Message-----
> From:    ghoffman@ucsd.edu [SMTP:ghoffman@ucsd.edu]
> Sent:    Tuesday, July 06, 1999 2:50 PM
> To:    pgsql-general@postgreSQL.org
> Subject:    [GENERAL] Finding an empty field
>
> I'm having trouble finding empty fields so that I can fill them.
>
> This type of query seems to yield no returned rows:
>
>    SELECT * FROM TABLE WHERE FIELD1 IS '';
> or
>    UPDATE TABLE SET FIELD1 = 'SOMETHING' WHERE FIELD1 IS '';
>
>
> I've also fooled around with EMPTY and NOT EXISTS, but I can't get it
> right.
>
> What do you recommend to find empty fields?
>
> Thanks,
> Gary
>
> **************************************************************************
> * Gary B. Hoffman, Computing Services Manager  e-mail: ghoffman@ucsd.edu *
> * Graduate School of International Relations and Pacific Studies (IR/PS) *
> * University of California, San Diego (UCSD)       voice: (619) 534-1989 *
> * 9500 Gilman Dr., La Jolla, CA 92093-0519 USA       fax: (619) 534-3939 *
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>