SQLQuokkaSQLQuokkaAirbnb wants to know how many nights an active listing typically sits empty. A booking occupies every night from check_in up to but not including check_out. Only nights between 2025-01-01 and 2025-12-31 count, so bookings that cross into or out of 2025 contribute only their 2025 nights. A listing's vacant nights are 365 minus its booked 2025 nights; bookings for the same listing never overlap. Active listings (is_active = 1) with no bookings are vacant all 365 nights, and inactive listings are ignored. Write an SQL query that returns a single column, avg_vacant_nights: the average vacant nights across active listings, rounded to the nearest whole number.
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