nlwiki Category misses its main article

SQL

SELECT c.page_title AS page_title, GROUP_CONCAT(cl1.cl_to SEPARATOR '\n') AS 'a-cats'
FROM (page c LEFT JOIN categorylinks cl3 ON cl3.cl_from=c.page_id), (page a LEFT JOIN categorylinks cl1 ON cl1.cl_from=a.page_id)
WHERE c.page_namespace=14 AND a.page_namespace=0 AND c.page_title=a.page_title AND a.page_is_redirect=0 AND
	NOT EXISTS (SELECT * FROM categorylinks cl2 WHERE cl2.cl_from=a.page_id AND cl2.cl_to=a.page_title) AND
    NOT EXISTS (SELECT * FROM page_props WHERE pp_page=a.page_id AND pp_propname='disambiguation')
GROUP BY c.page_title, a.page_namespace

SQL

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