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From:Gerald L. Clark Date:March 21 2001 4:31pm
Subject:Re: selecting null values
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Title will never be = NULL.
NULL is not equal to anything, not even NULL.

SELECT * FROM table WHERE title IS NULL LIMIT 1;

Peter Szekszardi wrote:
> 
> Hi,
> 
> I have a database which has a text field (let's name it title). The field
> is NULL initially. Now I have about a hundred thousand records in the db,
> where the title field is NULL. I have to fill these NULL title fields with
> the appropriate data, so I have to select them one-by-one, calculate the
> title field, and update the data. So my query would be:
> 
> SELECT * FROM table WHERE title = NULL LIMIT 1;
> 
> But it does not work. One of you wrote, that NULL is not equal with
> anything, not even with NULL. Could you please help me, what kind of
> select should I write in situations like this? In this particular case, I
> will do find a workaround, but I am curious, how to handle NULL values.
> 
> Regards,
> 
> Peter Szekszardi
> PortoLogic Ltd.
> Portal building, prime number generating, script hacking and more...
> The prime number of the day is 262559183
> 
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Thread
query with <> or !=Gilles Dumangin20 Mar
  • Re: query with <> or !=Sinisa Milivojevic20 Mar
  • selecting null valuesPeter Szekszardi21 Mar
    • RE: selecting null valuesCal Evans21 Mar
    • Re: selecting null valuesroger westin21 Mar
    • Re: selecting null valuesGerald L. Clark21 Mar
    • Re: selecting null valuesWilliam R. Mussatto21 Mar
    • Re: selecting null valuesChihiro Hio21 Mar
    • Re: selecting null valuesPaul DuBois21 Mar
RE: selecting null valuesRick Emery21 Mar
RE: selecting null valuesChris M. Oson21 Mar