b - Quarry

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

SQL

SELECT count(page_title)
FROM
(SELECT page_title,
page_latest,
COUNT(DISTINCT rev_actor) AS usrcnt
FROM revision
JOIN page
ON rev_page = page_id
WHERE page_namespace = 4
AND page_is_redirect = 0
GROUP BY page_id
HAVING usrcnt = 1) d
JOIN revision
ON page_latest = rev_id
JOIN actor
ON rev_actor = actor_id
WHERE actor_user = NULL;

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