Chapter 1 - Chapter 1 File Systems and Databases Data...

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Chapter 1 File Systems and Databases Data Processing (DP) Database Persistent collection of data and Metadata (data about the characteristics of the data and relationships of the data) Database Management System collection of programs to manage the database Manages and enforces database structure Includes interface to manipulate the data Allows data to be shared among multiple users Data vs Information Data: o Raw facts; building blocks of information o Unprocessed information Information: o 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 Importance of DBMS Makes data management more efficient and effective Query language allows quick answers to ad hoc queries Provides easier access to more and better-managed data Promotes an integrated view of organization’s operations Reduces the chance of inconsistent data Helps protect against loss of data
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DBMS Manages Interface Between Data and Users Database Design: Why Design is important The database is the foundation of the information system. Design should reflect the expected use Poor design results in unwanted redundancy Poor design leads to inconsistent data Poor design leads to poor performance Poor design leads to improper information systems operation
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Historical Roots First business computer applications focused on clerical tasks Requests for information quickly followed File systems developed to address needs
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Chapter 1 - Chapter 1 File Systems and Databases Data...

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