SQL
AخA
SELECT
p.page_lang AS Wikipedia,
COUNT(DISTINCT u.user_id) AS Total_Content_Translation_Users
FROM
user u
JOIN
actor a ON u.user_id = a.actor_user
JOIN
change_tag ct ON ct.ct_id = a.actor_id
JOIN
change_tag_def ctd ON ct.ct_tag_id = ctd.ctd_id
JOIN
revision r ON ct.ct_rev_id = r.rev_id
JOIN
page p ON r.rev_page = p.page_id
WHERE
ctd.ctd_name = 'contenttranslation'
AND u.user_registration >= '2015-01-01'
GROUP BY
p.page_lang
ORDER BY
Total_Content_Translation_Users DESC
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