How do I UNDO a query?

[TheGunOwner]

I am a newb, I admit it. But hey, we gotten learn sometime right?

Using PHPMyAdmin I recently successfully ran this query for a hack:

CREATE TABLE `profiletagboard` (
`id` INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY, 
`msg` TEXT NOT NULL, 
`touserid` TEXT NOT NULL, 
`fromuserid` TEXT NOT NULL, 
`date` TEXT NOT NULL,
FULLTEXT (`msg`)
);

I ended up not liking the hack much. I know how to remove everything except how do I UNDO this query?

Thanks!