Actually there's one more problem.

If table Table_PostsReplies is empty it won't select any posts.

I want to be able to select posts even though they have no reply in the replies...

That's elegant. Thanks a lot man.

It's no homework.

I did try something like this, well with normal join sintax.

One of the problems is p.PostID is not equal to row index. I want to select posts...