USE arwiki_p;

SELECT

    CONCAT(user_name) AS "المستخدم",

    SUM(CASE WHEN rev_timestamp BETWEEN 20170501000000 AND 20180101000000 THEN 1 ELSE 0 END) AS recent_user_editcount,

    COUNT(rev_id) AS user_editcount

    FROM user INNER JOIN revision

    ON revision.rev_user = user.user_id

    WHERE user_name IN (SELECT user_name FROM user_groups INNER JOIN user ON user_id = ug_user WHERE ug_group = 'reviewer') 

    and rev_timestamp >= 20000000000000

    GROUP BY user_name

    ORDER BY recent_user_editcount DESC

    LIMIT  100;