Untitled query #79943

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

SQL

SELECT concat('#[[', a.page_title, ']]')
FROM
  (SELECT page_id,
          page_title,
          COUNT(cl_to) AS total_categories
   FROM page
   JOIN categorylinks ON page_id = cl_from
   WHERE page_namespace = 0
   GROUP BY page_id) a
LEFT JOIN
  (SELECT cl_from,
          COUNT(*) AS existing_categories
   FROM categorylinks
   JOIN page ON page_title = cl_to
   AND page_namespace = 14
   GROUP BY cl_from) b ON a.page_id = b.cl_from
WHERE b.existing_categories IS NULL
  OR b.existing_categories = 0

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