Computer Science, asked by tehlilshafiq, 8 months ago

what do you mean by decomposition and dependencies preservation explain?​

Answers

Answered by Anonymous
0

Explanation:

Decomposition of a relation is done when a relation in relational model is not in appropriate normal form. Relation R is decomposed into two or more relations if decomposition is lossless join as well as dependency preserving.

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Answered by MinalBuchke
1

Answer:

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Explanation:

The dependency preservation decomposition is another property of decomposed relational database schema D in which each functional dependency X -> Y specified in F either appeared directly in one of the relation schemas Ri in the decomposed D or could be inferred from the dependencies that appear in some Ri

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