Chapter12.3 - Chapter 12 Information Systems Database...

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Chapter 12 Information Systems
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12-2 Database Management Systems Database A structured set of data Database management system (DBMS) A combination of software and data, including a physical database, a database engine, and a database schema Physical database A collection of files that contain the data Database engine Software that supports access to and modification of the database contents Database schema A specification of the logical structure of the data stored in the database
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12-3 Database Management Systems Figure 12.6 The elements of a database management system
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12-4 Database Management Systems Specialized database languages allow the user to specify the structure of data; add, modify, and delete data; and query the database to retrieve specific stored data The database schema provides the logical view of the data in the database
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12-5 The Relational Model In a relational DBMS, the data items and the relationships among them are organized into tables
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Chapter12.3 - Chapter 12 Information Systems Database...

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