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Lesson Navigation IconDBS: Concepts and Architectures

Unit Navigation IconDB-Models, Schemes and Instances

LO Navigation IconDatabase Models

LO Navigation IconSchemes and Instances

LO Navigation IconDB-Models vs. Spatial Models

Unit Navigation IconDBMS-Architecture

Unit Navigation IconLanguages and Interfaces

Unit Navigation IconTasks

Unit Navigation IconExercise Data Independence

Unit Navigation IconSummary

Unit Navigation IconRecommended Reading

Unit Navigation IconGlossary

Unit Navigation IconBibliography

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Database Models, Schemes and Instances

With the help of databases facts and processes from the real world should be described and stored in digital form. The abstraction from the real world to the digital format is done with the help of models, so called database models.
In this unit, the most often used database models are presented. Following, database schemes are introduced as a formal description of a concrete database and their database instances or their database state.

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