Landesarchiv Saarbrücken: volunteers

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SQL

SELECT a2.actor_name, COUNT(rev_id)
FROM image
INNER JOIN actor a1 ON img_actor = a1.actor_id
INNER JOIN page ON img_name = page_title
INNER JOIN revision ON rev_page = page_id
INNER JOIN actor a2 ON rev_actor = a2.actor_id
WHERE page_namespace = 6
AND a1.actor_name = 'LandesarchivSaarbrücken'
GROUP BY a2.actor_name
ORDER BY COUNT(rev_id) DESC
LIMIT 20

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