我有以下表格：
表格如下：follow_id, follow_followerid, follow_followingid
表学生：student_id, student_username, student_firstname, student_lastname
表状态：status_id, status_body, status_date
表forum_thread：forum_thread_body, forum_thread_title, forum_thread_date, forum_thread_priority, forum_thread_userid, forum_thread_firstname, forum_thread_lastname, forum_thread_username, forum_thread_avatar, forum_thread_id
表forum_post：forum_post_body, forum_post_userid, forum_post_date, forum_post_threadid, forum_post_firstname, forum_post_lastname, forum_post_username, forum_post_avatar, forum_post_id
我想计算最活跃的用户，即状态，评论，帖子和帖子回复最多的用户。
我该如何计算？