SQL
AخA
SELECT DISTINCT page_title FROM page AS P1
LEFT JOIN categorylinks ON cl_to = page_title
WHERE page_namespace = 14 AND page_is_redirect = 0
AND NOT EXISTS (
SELECT 1 FROM categorylinks
JOIN page AS P2 ON P2.page_namespace = 14 AND cl_to = P2.page_title
WHERE cl_from = P1.page_id
)
AND EXISTS (SELECT 1 FROM categorylinks WHERE cl_from = page_id)
AND cl_to IS NULL
ORDER BY page_title
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