(5) Consider the ER diagram shown below, which shows a simplifiedschema for an airline reservations system. Extract from the ER diagramthe requirements (Entities, attributes, relationships, keys) andconstraints that produced this schema. Be as precise as possible inyour requirements and constraints specification.Airport codeCityStateNameDEPARTUREAIRPORTLeg noAIRPORTScheduled_dep_timeScheduled_arr_timeFLIGHT LEGNMARRIVALAIRPORTCANInstancesLEGSLANDNumberType nameMax_seatsINSTANCE_OFCompanyAirlineFLIGHTN.AIRPLANE_ΤΥΡEArr timeWeekdaysDEPARTSKARRIVESRestrictionsFARESNDep_timeAmountΤΥPECodeFAREAirplane_idTotal no_of_seatsNo of avail_seatsASSIGNEDLEG_INSTANCEQateAIRPLANECustomer_nameCphoneSeat noRESERVATIONNotes:1A LEG (segment) is a nonstop portion of a flightA LEG INSTANCE is a particular occurrenceof a LEG on a particular date.SEAT

These are the important term to design an ER diagram of any Database:- 1.ENTITY:-It is represented…

(5) Consider the ER diagram shown below, which shöWS schema for an airline reservations system. Extract from the ER diagram the requirements (Entities, attributes, relationships, keys) and constraints that produced this schema. Be as precise as possible in your requirements and constraints specification.

(5) Consider the ER diagram shown below, which shöWS schema for an airline reservations system. Extract from the ER diagram the requirements (Entities, attributes, relationships, keys) and constraints that produced this schema. Be as precise as possible in your requirements and constraints specification.

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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(5) Consider the ER diagram shown below, which shows a simplified
schema for an airline reservations system. Extract from the ER diagram
the requirements (Entities, attributes, relationships, keys) and
constraints that produced this schema. Be as precise as possible in
your requirements and constraints specification.
Airport code
City
State
Name
DEPARTURE
AIRPORT
Leg no
AIRPORT
Scheduled_dep_time
Scheduled_arr_time
FLIGHT LEG
N
M
ARRIVAL
AIRPORT
CAN
Instances
LEGS
LAND
Number
Type name
Max_seats
INSTANCE_OF
Company
Airline
FLIGHT
N.
AIRPLANE_
ΤΥΡE
Arr time
Weekdays
DEPARTS
KARRIVES
Restrictions
FARES
N
Dep_time
Amount
ΤΥPE
Code
FARE
Airplane_id
Total no_of_seats
No of avail_seats
ASSIGNED
LEG_INSTANCE
Qate
AIRPLANE
Customer_name
Cphone
Seat no
RESERVATION
Notes:
1
A LEG (segment) is a nonstop portion of a flight
A LEG INSTANCE is a particular occurrence
of a LEG on a particular date.
SEAT

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