I don’t know SQL, please help

My site was hacked last night, and I decided to get it upgraded to v.2 og WordPress.

http://www.edotistic.com/errormessage.jpg

I keep getting the errormessage above, but I have no idea what it means – everything looks ok from the admin area, but the site itself keeps giving this error.

Also, there is one post (empty) that I can’t delete…wondering if it has something to do with it.

Any help, would be greately appreciated