use hewiki_p;

select * from page as c

where page_title in

(select page_title from page as a join categorylinks

 on cl_from = a.page_id

 where cl_to = "ויקיפדיה:_ערכים_שמתקיים_לגביהם_דיון_חשיבות_אנציקלופדית")

and page_namespace = 1

​