Managing Data Resources Case: Better data help Virgin Mobile Australia win the customer wars Virgin mobile Australia is a major player in the Australian mobile industry. It had grown aggressively by pioneering new products and services‚ including a prepaid service that did not require a contract‚ free voice mail‚ and billing all calls by second. Other operators followed suit‚ leaving Virgin Mobile Australia wondering how it could maintain its competitive lead. The answer lay in making better
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Character The most basic logical data element is the character‚ which consists of a single alphabetic‚ numeric‚ or other symbol. One might argue that the bit or byte is a more elementary data element‚ but we should remember that those terms refer to the physical storage elements provided by the computer hardware. Field The next higher level of data is the field‚ or data item. A field consists of a grouping of related characters. For example‚ the grouping of alphabetic characters in a person’s
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Database Manages Controls Contains Management System (DBMS) Database structure access to data query language Importance of DBMS • • • Makes data management more efficient and effective Query language allows quick answers to ad hoc queries Provides better access to more and bettermanaged data • • Promotes integrated view of organization’s operations Reduces the probability of inconsistent data DBMS Manages Interaction Database Design Importance Poor Poor
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data on disk in this way rather than all in one table. c) 7 What is database management system? What steps would the hospital ward need to take to prepare its data to be ready for producing meaningful output from the DBMS?d) 5 What are two main forms of output from a DBMS? Provide one example of each form of output using hospital
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Fie lFile Organization Terms & Conceptscomprises a record; A computer system organizes data in a hierarchy t A computer system organizes data in a hierarchy that starts with bits and bytes and progresses to fields‚ records‚ files‚ and databases. * A bit represents the smallest unit of data a computer can handle. * A group of bits‚ called a byte‚ represents a single character‚ which can be a letter‚ a number‚ or another symbol. * A grouping of characters into a
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INTRODUCTION Interest in information system has increased during the recent years not only in education but also in all areas where resources are managed. Two main reason account for this- the increasing population and the need for improved problem-solving tools. Student information system has always been a difficult task‚ but it is more so today than ever before‚ where administrators uses the traditional way of filing records on a cabinet. As the population of the students goes up‚ it is becoming
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phase main deliverable from each phase Centralized vs Distributed Processing Unit Testing Integration Testing System Testing Chapter 11 Database Database Models Hierarchical Network Multi-dimensional Relational O-O Object-Relational DBMS Data Warehouse Data Mining Cardinality XML Normalization Primary Key Foreign Key SQL create database/table add‚ modify‚ delete data retrieve‚ join data Chapter 12 High-Level vs. Low-Level Languages 1st‚ 2nd‚ 3rd‚ 4th‚ and 5th Generation
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DATABASE MANAGEMENT SYSTEM (DBMS) A Database Management System (DBMS) is a software program that typically operates on a database server or mainframe system to manage structured data‚ accept queries from users‚ and respond to those queries. A typical DBMS has the following features (Stair and Reynolds‚ 2004): Provides a way to structure data as records‚ tables‚ or objects Accepts data input from operators and stores that data for later retrieval Provides query languages for searching‚ sorting
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publicly accessible website‚ in whole or in part. 2 Learning Objectives In this chapter‚ you will learn: About flaws in file system data management The main components of the database system The main functions of a database management system (DBMS) ©2015 Cengage Learning. All Rights Reserved. May not be scanned‚ copied or duplicated‚ or posted to a publicly accessible website‚ in whole or in part. 3 Data vs. Information Data Raw facts Raw data - Not yet been processed to reveal the
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Introduction Objectives Objectives Upon completion of this chapter‚ you should be able to: Define security Describe Describe an information system and its components Define database management system functionalities Outline the concept of information security Identify the major components of information security architecture Define database security Describe security methods Security Security Definition Security is defined as the level and degree of being free from danger and
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