Usuários em abril de 2020 por ano de registro

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

Número de usuários que editaram em abril de 2020 agrupados por ano de registro

SQL

USE ptwiki_p;
SELECT
 COUNT(DISTINCT user_id) USUÁRIOS,
 SUBSTR(user_registration, 1, 4) ANO_REG
FROM
 revision
 INNER JOIN actor ON rev_actor = actor_id
 INNER JOIN user ON user_id = actor_user
WHERE
 rev_timestamp LIKE '202004%'
 AND actor_user
GROUP BY ANO_REG;

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