Re: Need efficient way to do comparison with NULL as an option - Mailing list pgsql-general

D. Dante Lorenso wrote:
>> But if I want to find all the items which are not in any folder, I want:
>>
>>   SELECT *
>>   FROM mytable
>>   WHERE folder_id IS NULL;
>>
>> I don't have any folder_id 0, so on a URL I might do this:
>>
>>   http://xyz/page.php?fid=123
>>   http://xyz/page.php?fid=0

SELECT * FROM mytable WHERE COALESCE( folder_id, 0 ) = 0;

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Lew