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Oracle认证考试

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in your database instance, the STATISTICS_LEVEL initialization parameter is set to BASIC.  What is the impactof this setting()

  • A、Optimizer statistics are collected automatically.
  • B、Only timed operating system (OS) statistics and plan execution statistics are collected.
  • C、The snapshots for the Automatic Workload Repository (AWR) are not generated automatically.
  • D、Snapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package.
  • E、The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
正确答案:C
答案解析:
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