Empty dated categories

This query is marked as a draft This query has been published by DannyS712.

SQL

USE enwikinews_p;
SELECT
  pg.page_title
FROM
  categorylinks cl
  JOIN page pg ON pg.page_id = cl.cl_from
WHERE
  cl.cl_to IN (
    SELECT
      pg2.page_title
    FROM
      categorylinks cl2
      JOIN page pg2 ON pg2.page_id = cl2.cl_from
    WHERE
      cl2.cl_to LIKE '20__'
      AND cl2.cl_type = 'subcat'
      AND cl2.cl_sortkey_prefix like '__'
  )
AND pg.page_title NOT IN (
	SELECT DISTINCT cl3.cl_to FROM categorylinks cl3
	WHERE cl3.cl_type = 'page'
)
AND pg.page_namespace = 14
ORDER BY pg.page_id

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