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QWhat did the use of explicit identifiers in the relational model enable in terms of query optimization?

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#13372Q ID
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  • A Rewriting queries in provably correct ways. ✔ ✖
  • B Storing complex internal structures efficiently. ✔ ✖
  • C Direct manipulation of disk addresses. ✔ ✖
  • D Simplifying update operations. ✔ ✖
Correct Answer: Option A

Explanation

The use of explicit identifiers as primary keys in the relational model enabled queries to be rewritten in provably correct ways, forming the basis of query optimization and improving performance.

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