AUTHENTICATION SYSTEM HHHH PK Loginld INTEGER password VARCHAR(20) PUBLISHER login +H manages A STAFF PK staff_id INTEGER name VARCHAR(50) maintains BOOK HP REPORTS Reg_no Userld Book no Issue/Retum date keeps track of + K RESERVE/RETURN PK NUMBER NUMBER NUMBER DATE HH +H 7 READER
AUTHENTICATION SYSTEM HHHH PK Loginld INTEGER password VARCHAR(20) PUBLISHER login +H manages A STAFF PK staff_id INTEGER name VARCHAR(50) maintains BOOK HP REPORTS Reg_no Userld Book no Issue/Retum date keeps track of + K RESERVE/RETURN PK NUMBER NUMBER NUMBER DATE HH +H 7 READER
Chapter7: Developing An Excel Application
Section: Chapter Questions
Problem 2.5CP
Related questions
Question
Please explain this Enhanced entity-relationship (EER) Diagram (see attached photo)
![PK
AUTHENTICATION SYSTEM H
PK Loginld INTEGER
password VARCHAR(20)
HH
PUBLISHER
Publisherld
INTEGER
Year of
publication
DATE
Name VARCHAR(50)
login
publishes
TH
STAFF
PK staff_id INTEGER
name VARCHAR(50)
maintains
PK
BOOK
manages
isbn number
authno
title
edition
category
price
HP
NUMBER
VARCHAR(20)
VARCHAR(20)
NUMBER
VARCHAR(10)
DOUBLE
HH
PK
PK
REPORTS
Reg_no
Userld
Book no
Issue/Return
date
keeps track of
RESERVE/RETURN
ID INTEGER
Reserve
DATE
date
Due date
DATE
Return date
DATE
NUMBER
NUMBER
NUMBER
DATE
HH TH
PK
CA
READER
Userld
INTEGER
Email VARCHAR(20)
VARCHAR(20)
address
phone no
INTEGER(10)
name
VARCHAR(50)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78237dbd-b0b1-4faf-8673-9f807d512e5e%2Fe64c2fec-1bd6-4661-b0ce-f26359bbc499%2Fhjmbad_processed.png&w=3840&q=75)
Transcribed Image Text:PK
AUTHENTICATION SYSTEM H
PK Loginld INTEGER
password VARCHAR(20)
HH
PUBLISHER
Publisherld
INTEGER
Year of
publication
DATE
Name VARCHAR(50)
login
publishes
TH
STAFF
PK staff_id INTEGER
name VARCHAR(50)
maintains
PK
BOOK
manages
isbn number
authno
title
edition
category
price
HP
NUMBER
VARCHAR(20)
VARCHAR(20)
NUMBER
VARCHAR(10)
DOUBLE
HH
PK
PK
REPORTS
Reg_no
Userld
Book no
Issue/Return
date
keeps track of
RESERVE/RETURN
ID INTEGER
Reserve
DATE
date
Due date
DATE
Return date
DATE
NUMBER
NUMBER
NUMBER
DATE
HH TH
PK
CA
READER
Userld
INTEGER
Email VARCHAR(20)
VARCHAR(20)
address
phone no
INTEGER(10)
name
VARCHAR(50)
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