Oracle
1Z0-083 · Question #48
1Z0-083 Question #48: Real Exam Question with Answer & Explanation
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Monitoring and Tuning
Question
Which two are true about the Oracle Optimizer?
Options
- AIt requires system statistics when generating SQL execution plans.
- BIt always generates an index access operation when a statement filters on an indexed column
- CIt ignores stale object statistics in the Data Dictionary.
- DIt can automatically re-optimize execution plans that were detected to be sub-optimal when
- EIt can re-write a statement internally in order to generate a more optimal plan.
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Topics
#Oracle Optimizer#Execution Plans#Query Rewriting#Adaptive Optimization