I assuem it is
SELECT *
FROM mdl_forum f
JOIN mdl_forum_discussions fd ON ON fd.forum = f.id
JOIN mdl_forum_posts fp ON tp.discussion = fd.id
I assuem it is
SELECT *
FROM mdl_forum f
JOIN mdl_forum_discussions fd ON ON fd.forum = f.id
JOIN mdl_forum_posts fp ON tp.discussion = fd.id