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Previous Year Question (PYQs)

Given below are the two statements:

Statement I: Any retrieval request that is specified in the basic relational algebra can also be specified in relational calculus.

Statement II: Any retrieval request that is specified in the relational calculus can also be specified in basic relational algebra.

In the light of the above statements, choose the correct answer from the options given below:





Solution

Relational algebra and relational calculus have the same expressive power.

Any query written in relational algebra can be written in relational calculus.

Any safe query written in relational calculus can also be written in relational algebra.

So, both statements are true.

Correct option is:

$\boxed{(a)\ \text{Both Statement I and Statement II are true}}$


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