New users from WLE2015 Brazil uploading images after contest

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

SQL

use commonswiki_p;

SELECT
 país,
 COUNT(*),
 SUM(user_registration > 20150501000000)
 FROM (SELECT
   DISTINCT SUBSTR(cl_to, 38) país,
   img_user
   FROM categorylinks INNER JOIN page ON cl_from = page_id INNER JOIN image ON page_title = img_name
   WHERE cl_type = 'file' AND cl_to IN (SELECT
     page_title
     FROM page
     WHERE page_namespace = 14 AND page_title = 'Images_from_Wiki_Loves_Earth_2015_in_Brazil' AND page_title NOT LIKE '%\_-\_%')
   ) users
 INNER JOIN user ON img_user = user_id
 GROUP BY país

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