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Explain Data abstraction or 3 schema architecture.
written 3.6 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.2k •   modified 3.6 years ago
distributed databases
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written 3.6 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.2k

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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