Categories who are under hidden categories only (zhwiki_p)

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

SQL

SELECT p.page_title, cl.cl_to, hc.pp_propname
FROM page p 
INNER JOIN categorylinks cl 
	ON p.page_id = cl.cl_from
LEFT JOIN (
    -- 11k
	SELECT p2.page_title, pp.pp_propname
	FROM page_props pp 
	LEFT JOIN page p2 ON (p2.page_id = pp.pp_page)
	WHERE pp.pp_propname = 'hiddencat'
) hc 
	ON cl.cl_to = hc.page_title
WHERE page_namespace = 14 -- 400k
LIMIT 100

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