Instructions: The figure below shows an EER diagram for a simplified credit card environment. There are two types of card accounts: debit cards and credit cards. Credit card accounts accumulate charges with merchants. Each charge is identified by the date and time of the charge as well as the primary keys of merchant and credit card. • Develop a relational schema. • Show the functional dependencies. • Develop a set of 3NF relations using an enterprise key. CUSTOMER

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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Instructions: The figure below shows an EER diagram for a simplified credit card environment. There
are two types of card accounts: debit cards and credit cards. Credit card accounts accumulate charges
with merchants. Each charge is identified by the date and time of the charge as well as the primary keys
of merchant and credit card.
• Develop a relational schema.
• Show the functional dependencies.
• Develop a set of 3NF relations using an enterprise key.
CUSTOMER
Customer ID
Cust Name
Cust Address
Holds
CARD ACCOUNT
MERCHANT
Account ID
Exp Date
Card Type
Merch ID
Merch Addr
Card Type =
"D
DEBIT CARD
Bank No
CHARGES
Charge Date
Charge Time
Amount
CREDIT CARD
Cur Bal
Transcribed Image Text:Instructions: The figure below shows an EER diagram for a simplified credit card environment. There are two types of card accounts: debit cards and credit cards. Credit card accounts accumulate charges with merchants. Each charge is identified by the date and time of the charge as well as the primary keys of merchant and credit card. • Develop a relational schema. • Show the functional dependencies. • Develop a set of 3NF relations using an enterprise key. CUSTOMER Customer ID Cust Name Cust Address Holds CARD ACCOUNT MERCHANT Account ID Exp Date Card Type Merch ID Merch Addr Card Type = "D DEBIT CARD Bank No CHARGES Charge Date Charge Time Amount CREDIT CARD Cur Bal
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