sub_subcats - Quarry

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

Sub-sub-categories of a Commons category, and the categories they are in

SQL

use commonswiki_p;
SELECT p2.page_title, GROUP_CONCAT(c_up.cl_to SEPARATOR ' / ') AS cats 
FROM categorylinks AS c1
JOIN page AS p1 ON c1.cl_from=p1.page_id AND p1.page_namespace=14 AND p1.page_is_redirect=0
JOIN categorylinks AS c2 ON c2.cl_to = p1.page_title
JOIN page AS p2 ON c2.cl_from=p2.page_id AND p2.page_namespace=14 AND p2.page_is_redirect=0
JOIN categorylinks AS c_up ON c_up.cl_from=p2.page_id
WHERE c1.cl_to='Hamlets_in_England_by_county'
GROUP BY p2.page_title;
# LIMIT 500;

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