The total file size under the Library Back-Up Project on Wikimedia Commons

This query is marked as a draft This query has been published by 維基小霸王.

https://commons.wikimedia.org/wiki/Commons:Library_back_up_project

SQL

SELECT DISTINCT cl_to AS SubCategoryName
FROM categorylinks
WHERE cl_from = (
  SELECT page_id
  FROM page
  WHERE page_title = "Library_back_up_project"
    AND page_namespace = 14 -- Assuming the Library_back_up_project category is in the Category namespace (namespace 14)
)
AND cl_to LIKE "%"; -- Optionally, you can add more specific conditions for filtering subcategories

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