USE arwiki_p; #set the language/project database

SELECT c.course_id,c.course_start,c.course_end,u.user_id,u.user_name,a.article_page_title

    FROM ep_courses c

        LEFT JOIN user u

            ON u.user_id = if(instr(c.course_students,concat(":",u.user_id,";"))>0,u.user_id,c.course_students)

            AND u.user_id > 1000 #to weed out the registration numbers

        LEFT JOIN ep_articles a

            ON a.article_user_id = u.user_id

            AND a.article_course_id IN (63)

WHERE c.course_id IN (63)

ORDER BY course_id, user_name; #option to specify specific courses or single course