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Explain Data abstraction or 3 schema architecture.
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written 2.0 years ago by
DevarenjiniP
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Data Abstraction
- That is the system hides certain implementation details of how data-is stored and Maintained.
- Reducing Complexity
- Achieved through three levels of Abstraction-3 Schema Architecture
Schema V/S Instance
Schema
Overall design of the database which is specified during db design and will not change frequently.
Schema provides names of …
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