topic_id
forum_id
topic_title
topic_first_post_id
topic_last_post_id
1
1
Topic
2
2
post_id
poster_id
topic_id
forum_id
post_text
1
1
1
1
Post 1
2
2
1
1
Post 2
3
3
1
1
Post 3
user_id
user_posts
username
username_clean
user_permissions
user_sig
1
1
user 1
user 1
2
1
user 2
user 2
3
1
user 3
user 3