How to conduct a massive truncate from a WP blog

Hello – I have been using wordpress for several months and have created a lot of unnecessary blog entries while attempting to make plugins, get the email to blog feature to work and just plain old messing around. I would like to start fresh and get my blog up and running by delete almost all of my entries. How can I do this through the back end in mysql? All of the entries I want to delete are in a row and I do not want to use the gui because it would take too long. It is roughly 100 or so entries I would like to delete. Can I just remove them from the rows in wp_posts or is there more to it?

Thanks!!