nlwiki Contaminated categories

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

Categories contaminated with pages in namespaces that don't belong.

SQL

SELECT 
	cl_to, 
    COUNT(DISTINCT page_namespace) AS `ns_count`,
    GROUP_CONCAT(DISTINCT page_namespace SEPARATOR ' | ') AS `namespaces`
FROM 
	categorylinks INNER JOIN page ON cl_from=page_id
WHERE 
	cl_to NOT REGEXP '^(Gebruiker|Portaal|Wikipedia):' AND
    page_namespace NOT IN (14, 100) AND 
    (page_namespace!=4 OR page_title NOT REGEXP '^(Gewenste_artikelen|Educatieprogramma/ITV_Hogeschool_voor_Tolken_en_Vertalers)/')
GROUP BY cl_to
HAVING `ns_count`>1

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