I am making a small forum for my website and i am not sure of the best way to store posts and threads.

Should i store them all in one table and just have a field "parent" that if it is blank it must be a thread and if not, it is a post.

Or should they be in separate tables?

I think that when they are together it makes it easier for me to count the number of posts and thread on the main forum page.

http://www.rapidfriends.com/forums.php That is what i have so far.