Chapter1 - 1 1 Chapter 1 Database Systems Database Systems:...

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Unformatted text preview: 1 1 Chapter 1 Database Systems Database Systems: Design, Implementation, and Management, Sixth Edition, Rob and Coronel 1 2 In this chapter, you will learn: The difference between data and information What a database is, about different types of databases, and why they are valuable assets for decision making Why database design is important How modern databases evolved from files and file systems 1 3 In this chapter, you will learn ( continued ): About flaws in file system data management How a database system differs from a file system, and how a DBMS functions within the database system 1 4 Data vs. Information Data: Raw facts; building blocks of information Unprocessed information Information: Data processed to reveal meaning Accurate, relevant, and timely information is key to good decision making Good decision making is key to survival in global environment 1 5 Introducing the Database and the DBMS Databaseshared, integrated computer structure that houses: End user data (raw facts) Metadata (data about data) 1 6 Introducing the Database and the DBMS ( continued ) DBMS (database management system): Collection of programs that manages database structure and controls access to data Possible to share data among multiple applications or users Makes data management more efficient and effective 1 7 DBMS Makes Data Management More Efficient and Effective End users have better access to more and better-managed data Promotes integrated view of organizations operations Probability of data inconsistency is greatly reduced Possible to produce quick answers to ad hoc queries 1 8 Types of Databases Single-user: Supports only one user at a time Most often centralized in one place Desktop: Single-user database running on a personal computer Most often centralized in one place Multi-user: Supports multiple users at the same time Can be either centralized or distributed over a network 1 9 Types of Databases ( continued ) Workgroup: Multi-user database that supports a small group of users or a single department Enterprise: Multi-user database that supports a large group of users or an entire organization 1 10 Uses of Databases Transactional (or production): Supports a companys day-to-day operations...
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This note was uploaded on 10/10/2011 for the course CIS339 NONE taught by Professor None during the Spring '10 term at DeVry Chicago.

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Chapter1 - 1 1 Chapter 1 Database Systems Database Systems:...

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