SQL for Java Devs · interview question
When analyzing an execution plan with EXPLAIN, which keyword indicates that an index is being used in a query?
Multiple choiceHardchapter-8-curatedpremiumsql-for-java-devsindexes
Answer and explanation
Correct answer
A. Using index
Why
The keyword 'Using index' in an execution plan indicates that the query optimizer is utilizing an index to access the data, which can improve query performance.
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