1z0-071 Exam Dumps | What is true about non-equijoin statement performance?

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Question 73/139

What is true about non-equijoin statement performance?

A. The between condition always performs less well than using the >= and <= conditions.

B. The Oracle join syntax performs better than the SQL: 1999 compliant ANSI join syntax.

C. The join syntax used makes no difference to performance.

D. The between condition always performs better than using the >= and <= conditions.

E. Table aliases can improve performance.

Correct Answer: C

Performance implications related to non-equijoin SQL statements in Oracle Database are often a topic of optimization:
* C. The join syntax used makes no difference to performance: In Oracle Database, the performance of a query involving joins is typically more dependent on factors like the underlying data distribution, indexes, optimizer statistics, and system configuration rather than the syntax (ANSI vs Oracle traditional syntax). The optimizer in Oracle is sophisticated enough to interpret different syntactical expressions of joins and optimize them accordingly.
References:
* Oracle Database Performance Tuning Guide 12c, which discusses the impact of different join syntaxes and how Oracle's optimizer handles them.

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