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Oracle认证考试

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While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?()

  • A、It updates the existing SQL profiles with current statistics.
  • B、It makes the statistics information available to GATHER_STATS_JOB
  • C、It initiates the statistics collection process by running GATHER_STATS_JOB
  • D、It logs a warning message in the alert log so that the DBA can perform statistics collection manually.
正确答案:B
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