the primary purpose of creating an index is to speed up data access, modern relational DBMS also support a type of index that additionally enforces a uniqueness constraint. A uniqueness constraint can be assigned to a table column directly, or is indirectly assigned to a table column when it is assigned a primary key constraint. While a uniqueness constraint is a logical construct, many modern relational DBMS physically implement this constraint through an index. You might reasonably ask the question
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Chapter 5 IT Infrastructure and Emerging Technologies IT Infrastructure • Shared technology resources providing platform for specific IS applications • Investment in hardware, software, services (consulting, education, training) • Foundation for serving customers, working with vendors, managing business process • Set of physical
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Database and database components Database management system Database models Database languages Database warehouse Database dictionary and indexing Databases A database is a collection of information that is organized so that it can easily be accessed, managed, and updated. In one view, databases can be classified according to types of content: bibliographic قائمة مراجع, full-text, numeric, and images. Database components Tables, Columns and Rows These three items form the building blocks
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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The six important business objectives of information technology are new products, services, and business models; customer and supplier intimacy; survival; competitive advantage; operational excellence; and: 1) _______ A) improved decision making. B) improved business practices. C) improved efficiency
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lead to it? Data redundancy exists when unnecessarily duplicated data are found in the database. It is the result of poorly designed databases which allow the data to be stored in different locations. 9. What is a DBMS and what are its functions? A database management system (DBMS) is a software package with computer programs that controls the creation, maintenance, and use of a database. It allows organizations to conveniently develop databases for various applications. 10. What is a business
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What is data independence, and why is it lacking in file systems? b. Data independence is when you change the data storage characterizes and it doesn’t affect the program’s ability to access the data. 4. What is a DBMS, and what are its functions? c. A DBMS (database management system) is a collection of program that stores and manages data and control access to the data in the collection. It is responsible for creating, editing, deleting and maintain all the data inserted.
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MIS – Homework ES Week 1 1. An information system can be defined technically as a set of interrelated components that collect (or retrieve), process, store, and distribute information to support: (Points: 2) Decision making and control in an organization. Communications and data flow. Manager's analyzing the organization raw data. The creation of new products and services. 2. The fundamental set of assumptions, values and ways of doing things that has been
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DESIGN AND IMPLEMENTATION OF COURSE REGISTRATION AND RESULT PROCESSING SYSTEM CHAPTER ONE 1. INTRODUCTION 1.1 BACKGROUND OF THE STUDY Caritas University, Amorji Nike, Enugu, is a private University approved by the Federal Government of Nigeria on December 16 2004. It was officially opened on January 21, 2005 by the Federal Ministry for Education, Prof. Fabian Osuji. The formal opening was on January 31, 2005. The pioneer students
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of the company to reduce costs, increase profits, and analyze data to make future predictions on the interests. In class, we went over (DBMS) Database management Systems it provides users with accessing all the data. Which, companies that use DBMS systems as its single pointed of management for all of its data resources as part of a database environment. Which DBMS leads to three types of problems they are Data redundancy, data isolation, and data inconsistency. Data reduncy is the same data that is
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system at a typical library. 9. Explain the relationship between logical and physical design. 10. What is the difference between a detail report, a summary report, and an exception report? 11. What is a DBMS? Briefly describe the components of a DBMS. 12. Is batch processing still relevant? Why or why not? 13. Why is a post-implementation evaluation important? Who should conduct it, and why? 14. Provide an example of technical obsolescence, and explain how
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