Most active users by bytes in this month (arwiki)

SQL

USE arwiki_p;
SELECT  user_name,
        SUM(CAST(rev.rev_len as signed)# - CAST(COALESCE(parent.rev_len,0)
            as signed)) AS edits_bytes,
		COUNT(rev.rev_id) AS edit_count
	FROM arwiki_p.revision rev
    	INNER JOIN user
             ON user_id = rev.rev_user
        LEFT OUTER JOIN revision parent
       		ON rev.rev_parent_id = parent.rev_id
        JOIN page
        	ON rev.rev_page = page_id
    WHERE page_namespace = 0
    AND rev.rev_timestamp BETWEEN 20160928000000 AND 20161002000000
    AND page_namespace = 0
    AND user_name Like 'Mervat_Salman'
    #AND user_name Like 'FShbib'
    #AND user_name Like 'باسم'
GROUP BY user_name
ORDER BY edits_bytes DESC;

SQL

Checking query status...