article list with bytes_added and edit_count

SQL

USE arwiki_p; #set the language/project database

SELECT a.article_course_id, a.article_user_id, a.article_page_title, SUM(CAST(r.rev_len as signed) - CAST(COALESCE(p.rev_len,0) as signed)) AS bytes_added, COUNT(r.rev_id) AS edit_count
	FROM ep_articles a
    	JOIN revision r
        ON r.rev_page = a.article_page_id
        LEFT OUTER JOIN revision p
        ON p.rev_id = r.rev_parent_id
WHERE article_course_id IN (63)
GROUP BY article_page_title
ORDER BY bytes_added DESC;

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)
GROUP BY article_page_title
ORDER BY course_id, article_page_title;
SQL

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