SQL
AخA
SELECT SUBSTRING_INDEX(page_title, '/', 1), count(*)
FROM page
JOIN (SELECT user_name
FROM user
WHERE user_registration > 20240000000000
AND user_editcount > 200) ON page_title LIKE CONCAT(user_name, '/%')
AND page_namespace = 2
AND page_is_redirect = 0
GROUP BY SUBSTRING_INDEX(page_title, '/', 1)
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