r.id, r.building_id, r.room_number, r.floor, r.capacity, r.gender, r.created_at, r.updated_at SELECT , b.name AS building_name FROM room r LEFT JOIN dormitory_building b ON r.building_id = b.id ORDER BY r.id SELECT , b.name AS building_name FROM room r LEFT JOIN dormitory_building b ON r.building_id = b.id AND r.building_id = #{buildingId} AND r.floor = #{floor} ORDER BY r.id SELECT , b.name AS building_name FROM room r LEFT JOIN dormitory_building b ON r.building_id = b.id WHERE r.building_id = #{buildingId} ORDER BY r.room_number SELECT , b.name AS building_name, (SELECT COUNT(*) FROM bed WHERE room_id = r.id AND status = 0) AS available_beds FROM room r LEFT JOIN dormitory_building b ON r.building_id = b.id WHERE r.building_id = #{buildingId} AND (SELECT COUNT(*) FROM bed WHERE room_id = r.id AND status = 0) > 0 ORDER BY r.room_number SELECT , b.name AS building_name FROM room r LEFT JOIN dormitory_building b ON r.building_id = b.id WHERE r.id = #{id} INSERT INTO room (building_id, room_number, floor, capacity, gender) VALUES (#{buildingId}, #{roomNumber}, #{floor}, #{capacity}, #{gender}) UPDATE room SET building_id = #{buildingId}, room_number = #{roomNumber}, floor = #{floor}, capacity = #{capacity}, gender = #{gender} WHERE id = #{id} DELETE FROM room WHERE id = #{id} SELECT COUNT(*) FROM bed WHERE room_id = #{roomId}