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with f as (select rental_date as d1, return_date as d2 from rental where customer_id=1) select d1,d2, ifnull((select f1.d2 from f as f1 where f1.d1>f.d1 and f1.d2>f.d2 and f1.d1<f.d2 limit 1 ) ,f.d2) as d3 from f

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