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When executing a SQL workload, you choose to generate execution plans only, without collecting execution statistics. Which two statements describe the implications of this?（）
A:It produces less accurate results of the comparison analysis.
B:It automatically calls the SQL Tuning Advisor for recommendations.
C:It shortens the time of execution and reduces the impact on system resources.
D:Only the changes in the execution plan, and not performance regression, are detected.

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出自：Oracle认证

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