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Which three are the valid statements in relation to SQL plan baselines？（）
A: The plans can be manually loaded to the SQL plan baseline.
B: The plans in the SQL plan baseline are verified and accepted plans.
C: The plans generated for every SQL statement are stored in the SQL plan baseline by default. 
D: The plan baselines are stored temporarily in the memory as long as the database instance is running.
E: For the SQL plan baselines to be accessible to the optimizer， the SYSAUX tablespace must be online.

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出自：Oracle认证

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