Exercise solution of chapter3 of datawarehouse cs614(solution of exercise)
- 1. SOLUTIONS OF REVIEW , EXERCISE QUESTIONS OF CHAPTER NO Indicate if true or false: A. Data warehousing helps in customized marketing. B. It is more important to include unstructured data than structured data in a data warehouse. C. Dynamic charts are themselves user interfaces. D. MPP is a shared-memory parallel hardware configuration. E. ERP systems may be substituted for data warehouses. F. Most of a corporation's knowledge base contains unstructured data. G. The traditional data transformation tools are quite adequate for a CRM-ready data warehouse. H. Metadata standards facilitate deploying a combination of best-of-breed products.
- 2. I. MDAPI is a data fusion standard. J. A Web-enabled data warehouse stores only the clickstream data captured at the corporation's Web site. SOLUTIONS:- 1. As the senior analyst on the data warehouse project of a large retail chain, you are responsible for improving data visualization of the output results. Make a list of your recommendations. SOLUTIONS:- 2.Explain how and why parallel processing can improve the performance for data loading and index creation.
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- 4. 4.Discuss three specific ways in which agent technology may be used to enhance the value of the data warehouse in a large manufacturing company.
- 7. Q.5: Your Company is in the business of renting DVDs and video tapes. The company has recently entered into e-business and the senior management wants to make the existing data warehouse Web-enabled. List and describe any three of the major tasks required for satisfying the management’s directive. Ans.: The single most remarkable phenomenon that has impacted computing and communication during the last few years is the Internet. At every major industry conference and in every trade journal, most of the discussions relate to the Internet and the Worldwide Web in one way or another. Starting with a meager number of just four host computer systems in 1969, the Internet has swelled to gigantic proportions with nearly 95 million hosts by 2000. It is still growing exponentially. The number of Worldwide Web sites has escalated to nearly 26 million by 2000. Nearly 150 million global users get on the Internet. Making full use of the everpopular Web technology, numerous companies have built Intranets and Extranets to reach their employees, customers, and business partners. The Web has become the universal information delivery system. It is also known that how the Internet has fueled the tremendous growth of electronic commerce in recent years. Annual volume of business-to-business e-commerce exceeds $300 billion and total e-commerce will soon pass the $1 trillion mark. No business can compete or survive without a Web presence. The number of companies conducting business over the Internet is expected to grow to 400,000 by 2003. As a data warehouse professional, what are the implications for you? Clearly, one has to tap into the enormous potential of the Internet and Web technology for enhancing the value of your data warehouse. Also, one needs to recognize the significance of e-commerce and enhance your warehouse to support and expand your company's e-business. One has to transform your data warehouse into a Web-enabled data warehouse. On the one hand, one has to bring your data warehouse to the Web, and, on the other hand, one needs to bring the Web to your data warehouse 1. The Warehouse to the Web In early implementations, the corporate data warehouse was intended for managers, executives, business analysts, and a few other high-level employees as a tool for analysis and decision making. Information from the data warehouse was delivered to this group of users in a client/server environment. But today's data warehouses are no longer confined to a select group of internal users. Under present conditions, corporations need to increase the productivity of all the members in the corporation's value chain. Useful information from the corporate data warehouse must be provided not only to the employees but also to customers, suppliers, and all other business partners. So in today's business climate, you need to open your data warehouse to the entire community of users in the value chain, and perhaps also to the general public. This is a tall order. How can you accomplish this requirement to serve information to thousands of users 6 in 24 x 7 mode? How can you do this without incurring exorbitant costs for information delivery? The Internet along with Web technology is the answer. The Web will be your primary information delivery mechanism. This new delivery method will radically change the ways your users will retrieve, analyze, and share information from your data warehouse. The components of your information delivery will be different. The Internet interface will include browser, search
- 8. engine, push technology, home page, information content, hypertext links, and downloaded Java or ActiveX applets. When you bring your data warehouse to the Web, from the point of view of the users, the key requirements are: self-service data access, interactive analysis, high availability and performance, zero-administration client (thin client technology such as Java applets), tight security, and unified metadata. 2. The Web to the Warehouse Bringing the Web to the warehouse essentially involves capturing the clickstream of all the visitors to your company's Web site and performing all the traditional data warehousing functions. And you must accomplish this, near real-time, in an environment that has now come to be known as the data Webhouse. Your effort will involve extraction, transformation, and loading of the clickstream data to the Webhouse repository. You will have to build dimensional schemas from the clickstream data and deploy information delivery systems from the Webhouse. Clickstream data tracks how people proceeded through your company's Web site, what triggers purchases, what attracts people, and what makes them come back. Clickstream data enables analysis of several key measures including: Customer demand Effectiveness of marketing promotions Effectiveness of affiliate relationship among products Demographic data collection Customer buying patterns Feedback on Web site design A clickstream Webhouse may be the single most important tool for identifying, prioritizing, and retaining e-commerce customers. The Webhouse can produce the following useful information: Site statistics Visitor conversions Ad metrics Referring partner links Site navigation resulting in orders Site navigation not resulting in orders Pages that are session killers Relationships between customer profiles and page activities Best customer and worst customer analysis 7 3. The Web-Enabled Configuration Figure 3.1 indicates an architectural configuration for a Web-enabled data warehouse. Notice the presence of the essential functional features of a traditional data warehouse. In addition to the data warehouse repository holding the usual types of information, the Webhouse repository contains clickstream data. The convergence of the Web and data warehousing is of supreme importance to every corporation doing business in the 21st century. REVIEW QUESTIONS:- 3.7. REVIEW QUESTIONS
- 9. 1. State any three factors that indicate the continued growth in data warehousing. Can you think of some examples? 2. Why do data warehouses continue to grow in size, storing huge amounts of data? Give any three reasons. 3. Why is it important to store multiple types of data in the data warehouse? Give examples of some non-structured data likely to be found in the data warehouse of a health management organization (HMO). 4. What is meant by data fusion? Where does it fit in data warehousing? 5. Describe four types of charts you are likely to see in the delivery of information from a data mart supporting the finance department. 6. What is SMP (symmetric multiprocessing) parallel processing hardware? Describe the configuration. 7. Explain what is meant by agent technology? How can this technology be used in a data warehouse? 8. Describe anyone of the options available to integrate ERP with data warehousing. 9. What is CRM? How can you make your data warehouse CRM-ready? 10. What do we mean by a Web-enabled data warehouse? Describe three of its functional features.