I have the following query:

SELECT "emails".id, "emails".message_id, subject, body, html, sent_at, 
t1.message_count
FROM "emails"
INNER JOIN "email_participants" 
ON ("email_participants"."email_id" = "emails"."id") 
LEFT JOIN (
 SELECT COUNT(*) message_count, message_id
 FROM replies 
 GROUP BY message_id) t1 
ON "emails".message_id = t1.message_id 
WHERE (("user_id" = 163) AND ("folder" = 'INBOX') 
AND ("emails".id NOT IN (SELECT email_id FROM Replies)))
ORDER BY "sent_at" DESC LIMIT 100 OFFSET 0;



I can handle everything apart from the derived table join, I could create a 
view but is it possible to join on  a derived table with the sequel gem?

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