在SQL中存储线程消息列表/树的最佳方法是什么？

I'm looking for the best way to store a set of "posts" as well as comments on those posts in SQL. Imagine a design similar to a "Wall" on Facebook where users can write posts on their wall and other users can comment on those posts. I need to be able to display all wall posts as well as the comments.I'm looking for the best way to store a set of