Test - Quarry

SQL

SELECT user_name, user_editcount, user_registration, rev_timestamp AS 'Last edit', GROUP_CONCAT(ug1.ug_group) AS 'user_groups'
FROM `user`
LEFT JOIN user_groups ug1
	ON user_id = ug1.ug_user AND ug1.ug_group IN ('sysop', 'interface-admin')
JOIN actor
	ON actor_user = user_id
JOIN revision_userindex
	ON rev_id = (SELECT rev_id FROM revision_userindex
                 WHERE actor_id = rev_actor
                 ORDER BY rev_timestamp DESC
                 LIMIT 1)
WHERE rev_timestamp < (DATE_FORMAT((NOW() - INTERVAL 2 DAY),'dd/MM/yyyy'))
    AND ug1.ug_group IS NOT NULL
GROUP BY user_name
ORDER BY rev_timestamp;
SQL

Checking query status...
