TSERVICE DRIVER ID1 ID2 dlnumber enumber first-name last-name phone [0.. ] BUS departure-city destination-city departure-time arrival time ID ID ID rego make Assigned-to > 1 - Assigned-to date-when-assigned ID 1... snumber Passes-through v 0..1 date-when-dis charged STOP stop-city departure-time arrival-time Your task is to perform a step of logical database design, i.e. to transform a conceptual schema given above into a collection of relational schemas. For each relational schema clearly list the names of attributes, primary key, candidate keys (if any), and foreign keys (if any). Assume, that a superset method must be used to implome
TSERVICE DRIVER ID1 ID2 dlnumber enumber first-name last-name phone [0.. ] BUS departure-city destination-city departure-time arrival time ID ID ID rego make Assigned-to > 1 - Assigned-to date-when-assigned ID 1... snumber Passes-through v 0..1 date-when-dis charged STOP stop-city departure-time arrival-time Your task is to perform a step of logical database design, i.e. to transform a conceptual schema given above into a collection of relational schemas. For each relational schema clearly list the names of attributes, primary key, candidate keys (if any), and foreign keys (if any). Assume, that a superset method must be used to implome
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
![Consider a conceptual schema given below.
LONGER TSERVICE
SHORTER TSERVICE
total-days
total-hours
DRIVER
TSERVICE
dlnumber
enumber
first-name
last-name
phone[e..]
ID1
ID2
BUS
departure-city
destination-city
departure-time
arrival time
ID
ID
ID
Assigned-to -
- Assigned-to
date-when-assigned
ID
rego
make
1..*
snumber
Passes-through
0..1
date-when-discharged
STOP
stop-City
edap
larrival-time
Your task is to perform a step of logical database design, i.e. to transform a conceptual
schema given above into a collection of relational schemas.
For each relational schema clearly list the names of attributes, primary key, candidate keys
(if any), and foreign keys (if any). Assume, that a superset method must be used to
implement a generalization.
T0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1ce1a45c-0331-48bc-8d71-d5b311ba04de%2Fedea679b-4b46-47b6-92a2-d8d67c81ef25%2Fzms2963b_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Consider a conceptual schema given below.
LONGER TSERVICE
SHORTER TSERVICE
total-days
total-hours
DRIVER
TSERVICE
dlnumber
enumber
first-name
last-name
phone[e..]
ID1
ID2
BUS
departure-city
destination-city
departure-time
arrival time
ID
ID
ID
Assigned-to -
- Assigned-to
date-when-assigned
ID
rego
make
1..*
snumber
Passes-through
0..1
date-when-discharged
STOP
stop-City
edap
larrival-time
Your task is to perform a step of logical database design, i.e. to transform a conceptual
schema given above into a collection of relational schemas.
For each relational schema clearly list the names of attributes, primary key, candidate keys
(if any), and foreign keys (if any). Assume, that a superset method must be used to
implement a generalization.
T0
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