onii-chan on "How to Re-associate comments with a user after moving wordpress"

Update: I've been working on this and I've gotten further, but I need some mySQL help.

In the wp_users section, my Author account's user id is 2. In the wp_comments, my author's user id is 1 (which I believe is actually my admin account's id.)

So if this is all making sense, how do I change a user id in the wp_comments table?

Thanks :)