result,err:=db.Query("SELECT coalesce(users.nick, '[Unknown]'), t.characters, t.words FROM (SELECT coalesce(groups.\"group\", messages.sender) AS hash, SUM(messages.characters) as characters, SUM(messages.words) as words FROM messages LEFT JOIN groups ON messages.sender = groups.nick AND groups.channel = 1 WHERE messages.channel = 1 GROUP BY hash ORDER BY characters DESC) t LEFT JOIN users ON t.hash = users.hash LIMIT 20")