SQL
AخA
select COUNT(recentchanges.rc_id) as c, actor_name from recentchanges
join comment on recentchanges.rc_comment_id=comment.comment_id
join actor on recentchanges.rc_actor=actor.actor_id
where comment_text like "Reverted%" or comment_text like "Undid%"
group by actor.actor_id
order by c desc;
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