Computer Science B. Refer to the following ERD. CUSTOMER Customer ID Cust Name Cust Address Holds MERCHANT Merch ID Merch Addr CARD ACCOUNT Account ID Exp Date Card Type Card Type DEBIT CARD CREDIT CARD CHARGES Bank No Cur Bl Charge Date o Charge Time Amount Copyright e2013 Pearson Education, publishing as Prentice Hall Let's make the following assumptions: There are 12,500,000 customers. These customers have altogether 40,000,000 card accounts. 80% are credit card while 20% are debit card accounts. There are 3,200,000 merchants. On average, there are 30 charges per merchant, per day. The range is very large. Customers are making on average, 2,000,000 requests per day to view their accounts and balances. Merchants are making on average, 5,000,000 requests per day to view the transactions they have submitted to the bank (Charges). a) Based on these assumptions draw up a usage map.

Computer Science B. Refer to the following ERD. CUSTOMER Customer ID Cust Name Cust Address Holds MERCHANT Merch ID Merch Addr CARD ACCOUNT Account ID Exp Date Card Type Card Type DEBIT CARD CREDIT CARD CHARGES Bank No Cur Bl Charge Date o Charge Time Amount Copyright e2013 Pearson Education, publishing as Prentice Hall Let's make the following assumptions: There are 12,500,000 customers. These customers have altogether 40,000,000 card accounts. 80% are credit card while 20% are debit card accounts. There are 3,200,000 merchants. On average, there are 30 charges per merchant, per day. The range is very large. Customers are making on average, 2,000,000 requests per day to view their accounts and balances. Merchants are making on average, 5,000,000 requests per day to view the transactions they have submitted to the bank (Charges). a) Based on these assumptions draw up a usage map.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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