NOT operator problem in MySQL

I want to create an SQL command in a MySQL/PHP environment where the NOT operator is used. I have created the following piece of code:

"SELECT software.*, FROM software,softwarever WH开发者_JAVA技巧ERE  
software.ID = softwarever.ID AND (software.ID='$_GET[text]' OR
software.Name='$_GET[text]') 
NOT(software.ID='$_GET[extra_text]' OR software.Name='$_GET[extra_text]')";

When I go and execute it however it gives me error due to the NOT operator. Does anyone knows if there is a solution to this? Thanks in advance!

P.S. I don't want the NOT IN operator

You need to put and AND or OR before your NOT, depending on your logic. And lose the comma after your SELECT. For exmaple:

"
SELECT software.*
FROM   software,softwarever 
WHERE  software.ID = softwarever.ID 
AND    (software.ID='$_GET[text]' OR software.Name='$_GET[text]') 
OR NOT (software.ID='$_GET[extra_text]' OR software.Name='$_GET[extra_text]')
";

You're missing AND/OR before the NOT.

The query doesn't know if you want X AND NOT Y or X OR NOT Y