select page_title from hewiki_p.iwlinks inner join hewiki_p.page p on p.page_id=iwl_from where iwl_prefix='commons' and length(iwl_title)>0 and iwl_title like 'Category:%' and p.page_namespace =0 and not exists(select * from commonswiki_p.page cp where cp.page_title=substr(iwl_title, 10) and cp.page_namespace=14) limit 10000;