Participants of WLE 2020 Ukraine by registration date

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

SQL

SELECT U.user_name#, U.user_registration
FROM commonswiki_p.image I
 JOIN commonswiki_p.page P ON I.img_name = P.page_title
 JOIN commonswiki_p.categorylinks CL ON P.page_id = CL.cl_from
 JOIN commonswiki_p.actor A ON I.img_actor = A.actor_id
 JOIN commonswiki_p.user U ON A.actor_user=U.user_id
WHERE P.page_namespace = 6
 AND CL.cl_to = "Images_from_Wiki_Loves_Earth_2015_in_Ukraine"
GROUP BY U.user_name
ORDER BY U.user_registration DESC

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