Commons categories with only redcategories that are empty

Fork of Commons categories with only redcategories (nonempty) by Prototyperspective

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

Created by Matěj Suchánek, requested here: https://meta.wikimedia.org/wiki/Research_talk:Quarry#c-Prototyperspective-20240924234200-Query_request

Output published at: https://commons.wikimedia.org/wiki/Commons:Report_UncategorizedCategories_with_redcats

SQL

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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