A key for this database is {Departure Time}. Enter a different key for the database.AirlineFlight NumberGate Destination Departure TimeFlyRight22134Denver08:27JetGreen 22213Anchorage08:43JetGreen 19922Honolulu08:46JetGreen 32234Anchorage09:36FlyRight12233Honolulu09:45FlyRight32322Detroit09:50FlyRight22233Denver09:55Key: { Ex: Gate

The given is a sample data set which shows the details about the departure of the Airline flights on different gates. As per the given details and description, the key is Departure TimeThe requirement in the database question is to find a new key. Key Condition: A key in the database is an attribute or set of attributes that uniquely identify the records. Key in database: The given database and sample data has below specifications: The flight is not unique as it has repeating values: But a flight in the same Airline is unique as below: Thus the key for the given database can be (Airline, FlightNumber), which uniquely identify all records.The given database has a key (Airline, FlightNumber)

Answered: A key for this database is (Departure…

Engineering

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A key for this database is (Departure Time}. Enter a different key for the database.

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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A key for this database is {Departure Time}. Enter a different key for the database.
Airline
Flight Number
Gate Destination Departure Time
FlyRight
221
34
Denver
08:27
JetGreen 222
13
Anchorage
08:43
JetGreen 199
22
Honolulu
08:46
JetGreen 322
34
Anchorage
09:36
FlyRight
122
33
Honolulu
09:45
FlyRight
323
22
Detroit
09:50
FlyRight
222
33
Denver
09:55
Key: { Ex: Gate

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