Consider the following ER diagram. Attribute 'Code' is an example of a for entity FARE.
Consider the following ER diagram. Attribute 'Code' is an example of a for entity FARE.
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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Transcribed Image Text:Consider the following ER diagram. Attribute 'Code' is an example of a
for entity FARE.
Airport_code City State Name
AIRPORT
Company
M
CAN_
LAND
N
Type_name Max_seats
AIRPLANE
TYPE
TYPE
N
Airplane_id
AIRPLANE
Seat_no
SEAT
Scheduled_dep_time
Dep_time
Total_no_of_seats
Customer_name
DEPARTS
N
N
ASSIGNED
DEPARTURE
AIRPORT
N
ARRIVES
ARRIVAL
AIRPORT
RESERVATION
N
Cphone
Scheduled_arr_time
Arr_time
N
N
INSTANCE_OF
Instances
N
Number
Airline
Weekdays
Restrictions
Amount
Code
No_of_avail_seats
LEG_INSTANCE
Date
Leg_no
FLIGHT LEG
N
LEGS
FLIGHT
1
FARES
N
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.
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