Dado HUESPED_GUEST(dni_idcard,nombre_name,nacio_born), siendo dni_idcard su prim...

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Dado HUESPED_GUEST(dni_idcard,nombre_name,nacio_born), siendo dni_idcard su primary key,HAB_ROOM(planta_floor,num,tipo_type) siendo su primary key planta_floor y num, con num el número de habitación, y RESERVA_RESERVATION(dni_idcard,planta_floor,num,desde_from,hasta_to), con dni_idcard referenciando a HUESPED_GUEST.dni_idcard, planta_floor y num referenciando a HAB_ROOM.planta_floor y HAB_ROOM.num respectivamente, donde la tabla RESERVA_RESERVATION guarda las reservas de habitaciones de los huéspedes a lo largo de cinco años. ¿Qué devuelve la siguiente consulta?

Given HUESPED_GUEST(dni_idcard,nombre_name,nacio_born) with dni_idcard being its primary key, HAB_ROOM(planta_floor,num,tipo_type) with its primary key being planta_floor and num, with num being the room number, and RESERVA_RESERVATION(dni_idcard,planta_floor,num,desde_from,hasta_to) with dni_idcard referencing  HUESPED_GUEST.dni_idcard, planta_floor and num referencing HAB_ROOM.planta_floor and HAB_ROOM.num respectively, where the table RESERVA_RESERVATION stores the room reservations done during the last five years. What is the result of the following statement?

Error

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El producto cartesiano de HUESPED_GUEST y RESERVA_RESERVATION

The Cartesian product of HUESPED_GUEST and RESERVA_RESERVATION

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Cero filas.

Zero rows

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