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While tuning a SQL statement, the SQL Tuning Advisor finds a

题目
单选题
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.

参考答案和解析
正确答案： D
解析： 暂无解析
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相似问题和答案

第1题：

To view the results of a manual SQL Tuning Advisor task, which steps should the DBA take?()

A. From the Advisor Central home page, select the tuning task from the Advisor Tasks section.

B. From Advisor Central, choose SQL Advisors, SQL Tuning Advisors, Manual Tuning Task Results.

C. From Advisor Central, choose SQL Advisors, Manual SQL Tuning Advisors, Tuning Task Results.

D. Either B or C


参考答案：A

第2题：

Which of the following identifies and creates an index to minimize the DB time for a particular SQL statement？（）  

  • A、 The SGA Tuning Advisor
  • B、 The SQL Access Advisor
  • C、 The SQL Tuning Advisor
  • D、 The Memory Advisor

正确答案:C

第3题：

View the Exhibit to examine the Automatic SQL Tuning result details.Which action would you suggest for the selected SQL statement in the Exhibit?()

A. Accept the recommended SQL profile.

B.Collect statistics for the related objects.

C. Run the Access Advisor for the SQL statement.

D. Run the Segment Advisor for recommendations.


参考答案：C

第4题：

What happens when you run the SQL Tuning Advisor with limited scope?（）

  • A、Access path analysis is not performed for SQL statements.
  • B、SQL structure analysis is not performed for SQL statements.
  • C、SQL Profile recommendations are not generated for SQL statements.
  • D、Staleness and absence of statistics are not checked for the objects in the SQL Tuning Advisor. In this case, SQL Tuning Advisor produces recommendations based on statistical checks, access path analysis, and SQL structure analysis. SQL profile recommendations are not generated.

正确答案:B,C

第5题：

Which of the following advisors within the Oracle advisory framework will analyze a single SQL statement and make recommendations for performance improvement?（）

  • A、SQL Repair Advisor
  • B、SQL Optimizer
  • C、SQL Access Advisor
  • D、SQL Tuning Advisor

正确答案:D

第6题：

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

第7题：

Which statement is true when you run the SQL Tuning Advisor with limited scope？（）

  • A、Access path analysis is not performed for the SQL statements.
  • B、SQL structure analysis is not performed for the SQL statements.
  • C、SQL Profile recommendations are not generated for the SQL statements.
  • D、The staleness and absence of the statistics are not checked for the objects in the query supplied to the SQL Tuning Advisor.

正确答案:C

第8题：

Which of the following cannot be used as input to the SQL Tuning Advisor?() (Choose all that apply.)

A. A single SQL statement provided by a user

B. An existing SQL Tuning Set (STS)

C. A preprocessed Database Replay workload

D. A schema name

E. SQL statement identified in EM as using excessive resources


参考答案：C, D

第9题：

Which of the following cannot be used as input to the SQL Tuning Advisor?（） (Choose all that apply.)

  • A、A single SQL statement provided by a user
  • B、An existing SQL Tuning Set (STS)
  • C、A preprocessed Database Replay workload
  • D、A schema name
  • E、SQL statement identified in EM as using excessive resources

正确答案:C,D

第10题：

To view the results of the most recent Automatic SQL Tuning Advisor task，which sequence should you follow？（）  

  • A、 EM Database home page，Software and Support，SQL Advisors，Automatic SQL Tuning Advisor
  • B、 EM Database home page，Software and Support，Advisor Central，SQL Advisors，Automatic SQL Tuning Advisor
  • C、 EM Database home page，Software and Support，Support Workbench，Advisor Central，SQL Advisors，Automatic SQL Tuning Advisor
  • D、 Either B or C
  • E、 All of the above

正确答案:D

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