Data Resource Management 3 Data Resource Management

Learning Objectives 3 Explain the importance of implementing data resource management processes and technologies in an organization. Understand the advantages of a database management approach to managing the data resources of a business.

3 Learning Objectives (continued) Explain how database management software helps business professionals and supports the operations and management of a business. Illustrate each of the following concepts: Major types of databases Data warehouses and data mining Logical data elements Fundamental database structures Database access methods Database development

Managing Data Resources Section I 3 Managing Data Resources

Data Resource Management 3 A managerial activity Applies information systems technology to managing data resources to meet needs of business stakeholders.

Foundation Data Concepts 3 Logical Data Elements

3 Levels of data Character Field Foundation Data Concepts (continued) Single alphabetical, numeric, or other symbol Field Groupings of characters Represents an attribute of some entity

Foundation Data Concepts (continued) 3 Foundation Data Concepts (continued) Records Related fields of data Collection of attributes that describe an entity Fixed-length or variable-length

3 Files (table) Foundation Data Concepts (continued) A group of related records Classified by Primary use Type of data permanence

3 Database Foundation Data Concepts (continued) Integrated collection of logically related data elements Consolidates records into a common pool of data elements Data is independent of the application program using them and type of storage device

Types of Databases 3 Operational Supports business processes and operations Also called subject-area databases, transaction databases, and production databases

Types of Databases (continued) 3 Distributed Replicated and distributed copies or parts of databases on network servers at a variety of sites. Done to improve database performance and security

3 External Hypermedia Types of Databases (continued) Available for a fee from commercial sources or with or without charge on the Internet or World Wide Web Hypermedia Hyperlinked pages of multimedia

Data Warehouses and Data Mining 3 Data warehouse Stores data extracted from operational, external, or other databases of an organization Central source of “structured” data May be subdivided into data marts

Data Warehouses and Data Mining (continued) 3 Data Warehouses and Data Mining (continued) Data mining A major use of data warehouse databases Data is analyzed to reveal hidden correlations, patterns, and trends

Database Management Approach 3 Database Management Approach Consolidates data records and objects into databases that can be accessed by many different application programs

Database Management Approach (continued) 3 Database Management Approach (continued) Database Management System Software interface between users and databases Controls creation, maintenance, and use of the database

3 Database Management Approach (continued)

Database Interrogation 3 Database Management Approach (continued) Database Interrogation Query Supports ad hoc requests Tells the software how you want to organize the data SQL queries Graphical (GUI) & natural queries

3 Database Maintenance Report Generator Updating and correcting data Database Management Approach (continued) Report Generator Turns results of query into a useable report Database Maintenance Updating and correcting data

Application Development 3 Database Management Approach (continued) Application Development Data manipulation language Data entry screens, forms, reports, or web pages

Implementing Data Resource Management 3 Implementing Data Resource Management Database Administration Develop and maintain the data dictionary Design and monitor performance of databases Enforce database use and security standards

Implementing Data Resource Management (continued) 3 Data Planning Corporate planning and analysis function Developing the overall data architecture

Implementing Data Resource Management (continued) 3 Data Administration Standardize collection, storage, and dissemination of data to end users Focused on supporting business processes and strategic business objectives May include developing policy and setting standards

3 Challenges Technologically complex Vast amounts of data Implementing Data Resource Management (continued) 3 Challenges Technologically complex Vast amounts of data Vulnerability to fraud, errors, and failures

Technical Foundations of Database Management 3 Section II Technical Foundations of Database Management

3 Database Structures Hierarchical Treelike One-to-many relationship Used for structured, routine types of transaction processing

Database Structures (continued) 3 Network More complex Many-to-many relationship More flexible but doesn’t support ad hoc requests well

3 Relational Data elements stored in simple tables Database Structures (continued) 3 Relational Data elements stored in simple tables Can link data elements from various tables Very supportive of ad hoc requests but slower at processing large amounts of data than hierarchical or network models

3 Multi-Dimensional A variation of the relational model Database Structures (continued) 3 Multi-Dimensional A variation of the relational model Cubes of data and cubes within cubes Popular for online analytical processing (OLAP) applications

Database Structures (continued) 3

3 Object-oriented Key technology of multimedia web-based applications Database Structures (continued) 3 Object-oriented Key technology of multimedia web-based applications Good for complex, high-volume applications

Database Structures (continued) 3

Key fields (primary key) Accessing Databases 3 Key fields (primary key) A field unique to each record so it can be distinguished from all other records in a table

Accessing Databases (continued) 3 Sequential access Data is stored and accessed in a sequence according to a key field Good for periodic processing of a large volume of data, but updating with new transactions can be troublesome

3 Direct access Methods Accessing Databases (continued) Key transformation Index Indexed sequential access

3 Data dictionary Database Development Directory containing metadata (data about data) Structure Data elements Interrelationships Information regarding access and use Maintenance & security issues

Database Development (continued) 3 Database Development (continued) Data Planning & Database Design Planning & Design Process Enterprise model Entity relationship diagrams (ERDs) Data modeling Develop logical framework for the physical design

Discussion Questions 3 How should an e-business enterprise store, access, and distribute data & information about their internal operations & external environment? What roles do database management, data administration, and data planning play in managing data as a business resource?

Discussion Questions (continued) 3 What are the advantages of a database management approach to organizing, accessing, and managing an organization’s data resources? What is the role of a database management system in an e-business information system?

Discussion Questions (continued) 3 Databases of information about a firm’s internal operations were formerly the only databases that were considered to be important to a business. What other kinds of databases are important for a business today? What are the benefits and limitations of the relational database model for business applications?

Discussion Questions (continued) 3 Why is the object-oriented database model gaining acceptance for developing applications and managing the hypermedia databases at business websites? How have the Internet, intranets, extranets, and the World Wide Web affected the types and uses of data resources available to business end users?

3 References James A. O'Brien; George M. Marakas. Management Information Systems: Managing Information Technology in the Business Enterprise 6th Ed., Boston: McGraw-Hill/ Irwin,2004