Database question

Im adding an Online users plugin. It says
create the following table in your WordPress DB
—
CREATE TABLE wp_onlinecounter (
timestamp int(15) NOT NULL default ‘0’,
ip varchar(40) NOT NULL default ”,
count int(15) NOT NULL default ‘0’,
PRIMARY KEY (timestamp)
) TYPE=MyISAM;

Well, i searched. But maybe no one else is as dumb as me and didnt need to ask this 😛
But how can i create that table in WP? I have looked around and cant figure it out.
Please help 🙂