chapter 7 with mods

chapter 7 with mods - Managing Digital Data Businesses...

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Management Information Systems, Sixth Edition 1 Managing Digital Data Businesses collect and dissect data for many purposes Data can be stored in database format Easy access and manipulation Databases have had a profound impact on business An information industry has been created Database technology integrated with the Internet has contributed to commerce significantly
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Management Information Systems, Sixth Edition 2 The Traditional File Approach Traditional file approach : no mechanism for tagging, retrieving, or manipulating data Database approach : provides powerful mechanism for managing and manipulating data Traditional approach is inconvenient: Program-data dependency High data redundancy Low data integrity Data redundancy : duplication of data Data integrity : accuracy of data
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Management Information Systems, Sixth Edition 3 The Traditional File Approach (continued)
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Management Information Systems, Sixth Edition 4 The Database Approach Database approach : data organized as entities Entity : an object about which an organization chooses to collect data, such as: People Events Products Character : smallest piece of data A single letter or a digit Field : single piece of information about entity
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Management Information Systems, Sixth Edition 5 The Database Approach (continued) Record : collection of related fields File : collection of related records Database fields can hold images, sounds, video clips, etc. Field name allows easy access to the data Database management system (DBMS) : program used to: Build databases Populate a database with data Manipulate data in a database
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Management Information Systems, Sixth Edition 6
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Management Information Systems, Sixth Edition 7
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Management Information Systems, Sixth Edition 8 The Database Approach (continued) Query : a message to the database requesting data from specific records and/or fields Database must be properly secured Not everyone should have access to all data Users will have different views of the database, based on the data they are allowed to see
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This note was uploaded on 06/02/2011 for the course MGSC 290 taught by Professor Johnston during the Fall '09 term at South Carolina.

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chapter 7 with mods - Managing Digital Data Businesses...

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