Red link cats with incoming links

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

Red link cats with incoming links

SQL

       use enwiki_p;
       SELECT
          CONVERT(cl_to USING utf8),
          COUNT(*)
        FROM categorylinks
        JOIN pagelinks ON pl_title = cl_to AND pl_namespace = 14
        JOIN page AS p1 ON pl_from = p1.page_id AND p1.page_namespace IN (0, 6, 10, 12, 14, 100)
        LEFT JOIN page AS p2 ON cl_to = p2.page_title AND p2.page_namespace = 14
        WHERE p2.page_title IS NULL
        GROUP BY 1 
       ;

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