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Lesson Navigation IconDBS: Concepts and Architectures

Unit Navigation IconDB-Models, Schemes and Instances

Unit Navigation IconDBMS-Architecture

Unit Navigation IconLanguages and Interfaces

LO Navigation IconDatabase Languages

LO Navigation IconDatabase Interfaces

LO Navigation IconUser Interfaces

Unit Navigation IconTasks

Unit Navigation IconExercise Data Independence

Unit Navigation IconSummary

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Database Interfaces

Working Principle of a Database Interface

Working Principle of a Database InterfaceWorking Principle of a Database Interface

The application poses with the help of SQL, a query language, a query to the database system. There, the corresponding answer (result set) is prepared and also with the help of SQL given back to the application. This communication can take place interactively or be embedded into another language.

Type and Use of the Database Interface

Following, two important uses of a database interface like SQL are listed:

Interactive SQL can be used interactively from a terminal.
Embedded SQL can be embedded into another language (host language) which might be used to create a database application.
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