Rose cultivars in Category:Roses at Roseraie de Bagatelle

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

This query makes the assumption that any category starting with "Rosa_'" is a rose cultivar category. This is true at the moment, but could concievably become false. Also, if any cultivars don't use this scheme, it will fail.

Some of the results are also Wikimedia category QIDs rather than rose cultivar QIDs directly; following the category's main topic links requires a different query.

SQL

use commonswiki_p;
SELECT DISTINCT categorylinks.cl_to, page.page_id FROM categorylinks WHERE categorylinks.cl_from IN
(
  SELECT page.page_id
  FROM categorylinks
  INNER JOIN page ON categorylinks.cl_from = page.page_id
  WHERE categorylinks.cl_to = "Roses_at_Roseraie_de_Bagatelle"
  AND page.page_namespace = 6
)
INNER JOIN page ON categorylinks.cl_from = page.page_id

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