dewiki: admin count by year of registration

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

SQL

SELECT
  #SUBSTR(MIN(rev_timestamp), 1, 4) AS year,
  #COUNT(actor_id) AS cnt
  user_name,
  MIN(rev_timestamp) AS first_edit
FROM
  actor_revision
    JOIN revision ON actor_id=rev_actor
    JOIN user ON actor_user=user_id
    JOIN user_groups ON user_id=ug_user
WHERE
  ug_group='sysop'
GROUP BY
  user_name;

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SQL

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