Files within a specific hidden category and any other visible category as well

This query is marked as a draft This query has been published by Peter Bowman.

SQL

set @hidden_cat = "Media_contributed_by_the_Mazovian_Digital_Library_–_needing_category";

select distinct(p1.page_title)
from page as p1
	inner join categorylinks as cl1 on cl1.cl_from = p1.page_id and cl1.cl_to = @hidden_cat
    inner join categorylinks as cl2 on cl2.cl_from = p1.page_id
where cl1.cl_type = "file" and cl2.cl_to not in (
	select page_title
	from page as p2 inner join page_props on pp_page = p2.page_id
	where page_namespace = 14 and pp_propname = "hiddencat"
);

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