Re: Selecting Null columns
| From: | Uzi Klein | Date: | Thu, 22 Apr 2004 06:21:15 +0000 |
| Subject: | Re: Selecting Null columns | ||
| References: | 1 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-34032@lists.php.net to get a copy of this message | ||
Maybe it is not null but has empty content?
the first statement is correct
try
>> SELECT * FROM questions WHERE (answer IS NOT NULL OR answer<>'');
or maybe
>> SELECT * FROM questions WHERE LENGTH(answer)>0;
----- Original Message -----
From: "Pambos Nicolaou" <pambos_15@hotmail.com>
To: <php-db@lists.php.net>
Sent: Thursday, April 22, 2004 7:11 AM
Subject: [PHP-DB] Selecting Null columns
Hi everyone
I am a new user of this mail list and I hope that it will be helpful.
I am trying to show the content of a MySQL table(raw) where the content of a
column is NOT NULL. I used the commands below but the result shows the
content of the whole table for the first case and nothing in the second
case.
>> SELECT * FROM questions WHERE answer IS NOT NULL ;
>> SELECT * FROM questions WHERE answer <> NULL ;
Thanks in advance
Nicolaou Pambos
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