b - Quarry

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

SQL

SELECT *, COUNT(*) as cnt
FROM revision
JOIN page
ON rev_page = page_id
JOIN actor
ON rev_actor = actor_id
JOIN user
ON actor_user = user_id
WHERE page_namespace = 4
AND page_is_redirect = 0
GROUP BY rev_page
HAVING cnt = 1;

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