Wikipedia articles with missing categories only

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

SQL

SELECT 
    a.page_id, 
    a.page_title
FROM 
    (SELECT 
         page_id, 
         page_title, 
         COUNT(cl_to) as total_categories 
     FROM page 
     JOIN categorylinks ON page_id = cl_from 
     WHERE page_namespace = 0 
     GROUP BY page_id) a
LEFT JOIN 
    (SELECT 
         cl_from, 
         COUNT(*) as existing_categories 
     FROM categorylinks 
     JOIN page ON page_title = cl_to AND page_namespace = 14 
     GROUP BY cl_from) b ON a.page_id = b.cl_from
WHERE 
    b.existing_categories IS NULL OR b.existing_categories = 0
LIMIT 100;

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