Figure 4-32 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.
a. Develop a relational schema.

b. Show the functional dependencies.
c. Develop a set of 3NF relations.

Transcribed Image Text:

CUSTOMER Customer ID Cust Name Cust Address Holds CARD ACCOUNT MERCHANT Merch ID Account ID Exp Date Card Type Merch Addr Card Type = "C" "D" DEBIT CARD CREDIT CARD CHARGES Bank No Charge Date Charge Time Amount Cur Bal