SQL
x
SELECT rev_user_text
FROM (
SELECT cl_from
FROM commonswiki_p.categorylinks
WHERE cl_to IN (
"Images_from_Science_Photo_Competition_2016_in_Ukraine"
)
) images
JOIN commonswiki_p.page ON
cl_from = page_id AND
page_namespace = 6
JOIN commonswiki_p.revision_userindex ON
rev_page = page_id AND
rev_parent_id = 0
GROUP BY rev_user_text
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