Share of images uploaded by non-autoconfirmed users per month (huwiki)

Fork of Share of images uploaded by non-autoconfirmed users (huwiki) by Tgr

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

SQL

use huwiki_p;

SELECT
    substr(img_timestamp, 1, 6) month,
    (user_registration IS NULL
      OR str_to_date(substr(img_timestamp, 1, 8), '%Y%m%d') > str_to_date(substr(user_registration, 1, 8), '%Y%m%d') + INTERVAL 4 DAY) was_confirmed,
    COUNT(*) count
  FROM image
    JOIN user ON img_user = user_id AND user_id != 0
  GROUP BY month, was_confirmed
  ORDER BY month, was_confirmed
;

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