Important articles without portal links

SQL

SELECT  STRAIGHT_JOIN Pp.page_title AS Portal, SUBSTRING_INDEX(Ct.cl_to, "-", 1) AS Importance,
 SUBSTRING_INDEX(Cq.cl_to, "_", 1) AS Quality, Pa.page_title AS Article
FROM page Pp
JOIN categorylinks Ct ON Ct.cl_type="page" AND Ct.cl_to IN
 (CONCAT("Top-importance_",Pp.page_title,"_articles"), CONCAT("High-importance_",Pp.page_title,"_articles"),
  CONCAT("Top-importance_",LOWER(SUBSTRING(Pp.page_title,1,1)),SUBSTRING(Pp.page_title FROM 2),"_articles"),
  CONCAT("High-importance_",LOWER(SUBSTRING(Pp.page_title,1,1)),SUBSTRING(Pp.page_title FROM 2),"_articles"))
JOIN page Pt ON Pt.page_id=Ct.cl_from AND Pt.page_namespace=1 /* Talk page */
JOIN page Pa ON Pa.page_namespace=0 AND Pa.page_title=Pt.page_title /* Article */
LEFT JOIN categorylinks Cq ON Cq.cl_from=Pa.page_id AND Cq.cl_type="page" AND Cq.cl_to IN ("Featured_articles", "Good_articles")
WHERE Pp.page_namespace=100 AND Pp.page_id IN
 (SELECT cl_from FROM categorylinks Cp WHERE Cp.cl_type="page" AND Cp.cl_to="Portals_needing_placement_of_incoming_links")
AND NOT EXISTS (SELECT 1 FROM pagelinks WHERE pl_from=Pa.page_id AND pl_title=Pp.page_title AND pl_namespace=100)
ORDER BY Portal, Importance DESC, IFNULL(Quality, "Z"), Article
SQL

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