USE fawiki_p;

                    SELECT count (1)

                    FROM (select rev_id,rev_page,rev_actor,rev_comment_id from revision where rev_timestamp > NOW() - INTERVAL 6 MONTH) R JOIN page ON R.rev_page=page_id AND page_namespace = 0

                    JOIN actor ON R.rev_actor = actor_id and actor_name NOT LIKE 'Yamaha5'

                    JOIN comment ON R.rev_comment_id = comment_id and   

                    comment_text LIKE '%خنثی•سازی%' and comment_text LIKE '%Yamaha5%'

                    group by R.rev_id;