Enwiki articles with nonexistent Kansas categories

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

Answering the request at https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_%28technical%29&oldid=720191223#Fixing_some_erroneous_categories

SQL

USE enwiki_p;
SELECT DISTINCT article.page_title
FROM page AS article
JOIN categorylinks AS articlecat
ON articlecat.cl_from = article.page_id
WHERE article.page_namespace = 0
AND articlecat.cl_to LIKE '%Kansas'
AND NOT EXISTS (SELECT 1
  FROM page AS catpage
  WHERE catpage.page_title = articlecat.cl_to
  AND catpage.page_namespace = 14
)
ORDER BY article.page_title;

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