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List all current customers by region. List all new customers by region. Report all invoices by customer and by region.

List all current customers by region. List all new customers by region. Report all invoices by customer and by region.

Database System Concepts
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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QUESTION 4 The following data structure and constraints exist for a magazine publishing company. The company publishes one regional magazine each in Kwazulu-Natal (KZN), Mpumalanga (MP), Limpopo (LP), and Gauteng (GP). The company has 300,000 customers (subscribers) distributed throughout these four provinces. On the first of each month, an annual subscription INVOICE is printed and sent to each customer whose subscription is due for renewal. The INVOICE entity contains a REGION attribute to indicate the customer's province of residence (KZN, MP, LP, GP): CUSTOMER (CUS NUM, CUS_NAME, CUS_ADDRESS, CUS_CITY, CUS_PROVINCE, CUS_ZIP, CUS SUBSDATE) INVOICE (INV NUM, INV_REGION, CUS_NUM, INV_DATE, INV_TOTAL) The company is aware of the problems associated with centralized management and has decided that it is time to decentralize the management of the subscriptions in its four regional subsidiaries. Each subscription site will handle its own customer and invoice data. The management at company headquarters, however, will have access to customer and invoice data to generate annual reports and to issue ad hoc queries, such as: List all current customers by region. List all new customers by region. Report all invoices by customer and by region. a) What recommendations will you make regarding the type and characteristics of the required database system? b) Suppose the database is to be horizontally partitioned, using the PROVINCE attribute for the CUSTOMER table and the REGION attribute for the INVOICE table, design the database fragments. Show an example with node names, location, fragment names, attribute names, and demonstration data.
Transcribed Image Text:QUESTION 4 The following data structure and constraints exist for a magazine publishing company. The company publishes one regional magazine each in Kwazulu-Natal (KZN), Mpumalanga (MP), Limpopo (LP), and Gauteng (GP). The company has 300,000 customers (subscribers) distributed throughout these four provinces. On the first of each month, an annual subscription INVOICE is printed and sent to each customer whose subscription is due for renewal. The INVOICE entity contains a REGION attribute to indicate the customer's province of residence (KZN, MP, LP, GP): CUSTOMER (CUS NUM, CUS_NAME, CUS_ADDRESS, CUS_CITY, CUS_PROVINCE, CUS_ZIP, CUS SUBSDATE) INVOICE (INV NUM, INV_REGION, CUS_NUM, INV_DATE, INV_TOTAL) The company is aware of the problems associated with centralized management and has decided that it is time to decentralize the management of the subscriptions in its four regional subsidiaries. Each subscription site will handle its own customer and invoice data. The management at company headquarters, however, will have access to customer and invoice data to generate annual reports and to issue ad hoc queries, such as: List all current customers by region. List all new customers by region. Report all invoices by customer and by region. a) What recommendations will you make regarding the type and characteristics of the required database system? b) Suppose the database is to be horizontally partitioned, using the PROVINCE attribute for the CUSTOMER table and the REGION attribute for the INVOICE table, design the database fragments. Show an example with node names, location, fragment names, attribute names, and demonstration data.
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