In the following ER diagram, the Key for LEG_INSTANCE must includeAirport_code City State NameCompanyType_name Max_seatsDateSeat_noAIRPORTLeg_noMCANLANDNAirplane_idNumberAIRPLANE_TYPETYPE1NAIRPLANESEATAirport_codeSeat_noScheduled_dep_timeTotal_no_of_seatsCustomer_nameScheduled_arr_timeScheduled_dep_timeDep_timeNDEPARTS1NASSIGNEDDEPARTUREAIRPORTNARRIVESNARRIVALAIRPORTRESERVATIONCphoneScheduled_arr_timeArr_timeNNINSTANCE_OFNInstancesNumberAirlineWeekdaysRestrictionsAmountCodeNo_of_avail_seatsLEG_INSTANCEDateLeg_noFLIGHT LEGNLEGSFLIGHT1FARESNFARENotes:A LEG (segment) is a nonstop portion of a flightA LEG_INSTANCE is a particular occurrenceof a LEG on a particular date.

As per the given information, we need to find the key attributes that should compose the LEG…

In the following ER diagram, the Key for LEG_INSTANCE must include Airport code City State Name Company AIRPORT Type_name Max_seats Date Seat_no Leg_no Number CAN LAND N Airplane_id M AIRPLANE TYPE TYPE N AIRPLANE SEAT Seat no Airport_code Total_no_of_seats Scheduled_dep_time Customer_name Scheduled arr time Dep_time Scheduled_dep_time DEPARTS N ASSIGNED DEPARTURE AIRPORT N RESERVATION ARRIVAL AIRPORT ARRIVES Scheduled_arr_time Cphone Arr_time N INSTANCE_OF Instances LEGS Number Airline Weekdays Restrictions Amount Code No_of_avail_seats LEG_INSTANCE Leg_no Date FLIGHT LEG FLIGHT FARES FARE Notes: A LEG (segment) is a nonstop portion of a flight A LEG_INSTANCE is a particular occurrence of a LEG on a particular date.

In the following ER diagram, the Key for LEG_INSTANCE must include Airport code City State Name Company AIRPORT Type_name Max_seats Date Seat_no Leg_no Number CAN LAND N Airplane_id M AIRPLANE TYPE TYPE N AIRPLANE SEAT Seat no Airport_code Total_no_of_seats Scheduled_dep_time Customer_name Scheduled arr time Dep_time Scheduled_dep_time DEPARTS N ASSIGNED DEPARTURE AIRPORT N RESERVATION ARRIVAL AIRPORT ARRIVES Scheduled_arr_time Cphone Arr_time N INSTANCE_OF Instances LEGS Number Airline Weekdays Restrictions Amount Code No_of_avail_seats LEG_INSTANCE Leg_no Date FLIGHT LEG FLIGHT FARES FARE Notes: A LEG (segment) is a nonstop portion of a flight A LEG_INSTANCE is a particular occurrence of a LEG on a particular date.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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