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私は現在持っています
select * from A where A.id not in (select B.id from B where B.user ='b') and A.user <> 'b'
JOINこのクエリを次のようなものを使用するように変更するにはどうすればよいですか?LEFT JOIN user AS last_replied_user ON topic.last_replied_by = last_replied_user.uid
JOIN
LEFT JOIN user AS last_replied_user ON topic.last_replied_by = last_replied_user.uid