dewiki: admin count by year of registration

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

SQL

SELECT
  SUBSTR(user_registration, 1, 4) AS year, 
  COUNT(user_id) AS cnt
FROM
  user
    JOIN user_groups ON ug_user=user_id
WHERE
  ug_group='sysop'
  AND user_name NOT IN (  -- https://de.wikipedia.org/wiki/Wikipedia:Liste_der_Administratoren#Servicefunktionstr%C3%A4ger_mit_Adminrechten
    'Bearbeitungsfilter',
    'Arabsalam',
    'Falten-Jura',
    'Icodense99',
    'Luke081515',
    'Miraki',
    'Regiomontanus',
    'Sophie Elisabeth',
    'Stephan Hense'
  )
GROUP BY
  year;

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