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백제완: [SQL] Trips and Users_241119

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	`1`	`+SELECT`
	`2`	`+ request_at AS Day`
	`3`	+ , ROUND(SUM(IF(STATUS <> 'completed', 1, 0)) / COUNT(*), 2) AS `Cancellation Rate`
	`4`	`+FROM`
	`5`	`+ trips t`
	`6`	`+JOIN`
	`7`	`+ users u1`
	`8`	`+ ON t.client_id = u1.users_id`
	`9`	`+ AND u1.banned = 'No'`
	`10`	`+JOIN`
	`11`	`+ users u2`
	`12`	`+ ON t.driver_id = u2.users_id`
	`13`	`+ AND u2.banned = 'No'`
	`14`	`+WHERE`
	`15`	`+ request_at BETWEEN '2013年10月01日' AND '2013年10月03日'`
	`16`	`+GROUP BY`
	`17`	`+ request_at;`

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