Re: Selecting Null columns

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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@xxxxxxxxxxx>
To: <php-db@xxxxxxxxxxxxx>
Sent: Thursday, April 22, 2004 7:11 AM
Subject:  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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