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

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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Question

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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