TAILIEUCHUNG - Lecture Introduction to information systems (16/e): Chapter 5 - George Marakas, James O'Brien

Chapter 5 - Data resource management. After reading and studying this chapter, you should be able to: Explain the business value of implementing data resource management processes and technologies in an organization; outline the advantages of a database management approach to managing the data resources of a business, compared with a file processing approach; explain how database management software helps business professionals and supports the operations and management of a business. | Chapter 5 Data Resource Management Learning Objectives Explain the value of implementing data resource management processes and technologies in an organization. Outline the advantages of a database management approach to managing the data resources of a business, compared with a file processing approach. Explain how database management software helps business professionals and supports the operations and management of a business. Learning Objectives Provide examples to illustrate each of the following concepts: Major types of databases Data warehouses and data mining Logical data elements Fundamental database structures Database development Section 1 Technical Foundations of Database Management II. Fundamental Data Concepts Character – the most basic logical data element that can be observed, a single alpha or numeric or other symbol, represented by one byte Field – a grouping of related characters, as a last name or a salary, represents an attribute of some entity General Purpose Application Programs – perform common information processing jobs for end users II. Fundamental Data Concepts Record – a grouping of attributes that describe an entity File – a group of related data records Database – a collection of logically related data elements IV. Database Development Database Administrator (DBA) – controls development and administration of the database Data Definition Language (DDL) – used to specify the contents, relationships, and structure of the database Data Dictionary – directory containing the metadata IV. Database Development Metadata – data about the data Data Planning and Database Design Data Modeling (Entity-Relationship Diagrams) – logical models of the data itself; this must be done before choosing the database model Schema – the physical/internal view of a system Subschema – the logical/external view of a system IV. Database Development Entity Relationship Diagram Section 2 Managing Data Resources I. Data Resource Management Data are an organizational

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