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

SQL

AخA
 
SELECT user_id, user_name, GROUP_CONCAT(ug_group SEPARATOR ",") AS user_groups
FROM user
LEFT JOIN actor ON user_id = actor_user
INNER JOIN user_groups ON user_id = ug_user AND ug_group IN ('patroller', 'rollbacker')
GROUP BY user_id
HAVING user_groups LIKE '%rollbacker%' AND user_groups NOT LIKE '%patroller%' 
ORDER BY user_name
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