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多选题Which three are the valid statements in relation to SQL plan baselines?（）AThe plans can be manually loaded to the SQL plan baseline.BThe plans in the SQL plan baseline are verified and accepted plans.CThe plans generated for every SQL statement are sto

题目
多选题
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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相似问题和答案

第1题：

You want to analyze a SQL Tuning Set (STS) using SQL Performance Analyzer in a test database. Which two statements are true regarding the activities performed during the test execution of SQLs in a SQL Tuning Set?（）

A.Every SQL statement in the STS is considered only once for execution

B.The SQL statements in the STS are executed concurrently to produce the execution plan and execution statistics

C.The execution plan and execution statistics are computed for each SQL statement in the STS

D.The effects of DDL and DML are considered to produce the execution plan and execution statistics


参考答案：A, C

第2题：

Which three features work together, to allow a SQL statement to have different cursors for the samestatement based on different selectivity ranges?()

A. Bind Variable Peeking

B. SQL Plan Baselines

C. Adaptive Cursor Sharing

D. Bind variable used in a SQL statement

E. Literals in a SQL statement


参考答案：A, C, E

第3题：

Which two statements about the SQL Management Base (SMB) are true?()

A. It contains only SQL profiles generated by SQL Tuning Advisor.

B. It stores plans generated by the optimizer using a stored outline.

C. It is part of the data dictionary and stored in the SYSAUX tablespace.

D. It is part of the data dictionary and stored in the SYSTEM tablespace.

E. It contains the statement log, the plan history, plan baselines, and SQL profiles.


参考答案：C, E

第4题：

Which three statements about performance analysis by SQL Performance Analyzer are true? （）(Choose three.)

  • A、It detects changes in SQL execution plans.
  • B、It produces results that can be used to create the SQL plan baseline.
  • C、The importance of SQL statements is based on the size of the objects accessed.
  • D、It generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.
  • E、It shows only the overall impact on workload and not the net SQL impact on workload.

正确答案:A,B,D

第5题：

Which of the following objects contains control structures that are considered the bound form of SQL statements?（）

  • A、UDT
  • B、Trigger
  • C、Package
  • D、Access plan

正确答案:C

第6题：

Which three statements are true about SQL plan directives?()

A. They are tied to a specific statement or SQL id.

B. They instruct the maintenance job to collect missing statistics or perform dynamic sampling to generate a more optimal plan.

C. They are used to gather only missing statistics.

D. They are created for a query expression where statistics are missing or the cardinality estimates by the optimizer are incorrect.

E. They instruct the optimizer to create only column group statistics.

F. Improve plan accuracy by persisting both compilation and execution statistics in the SYSAUX tablespace.


参考答案：B, D, E

第7题：

Which of the following objects contains control structures that are considered the bound form of SQL statements?()

A.UDT

B.Trigger

C.Package

D.Access plan


参考答案：C

第8题：

You run the SQL Tuning Advisor (STA) to tune a SQL statement that is part of a fixed SQL plan baseline. The STA generates a SQL profile for the SQL statement, which recommends that you accept the profile. Which statement is true when you accept the suggested SQL profile?（）

A. The tuned plan is not added to the SQL plan baseline.

B. The tuned plan is added to the fixed SQL plan baseline as a fixed plan.

C. The tuned plan is added to the fixed SQL plan baseline as a nonfixed plan.

D. The tuned plan is added to a new nonfixed SQL plan baseline as a nonfixed plan.


参考答案：C

第9题：

Which three statements about performance analysis by SQL Performance Analyzer are true? （）

  • A、It detects changes in SQL execution plans.
  • B、It produces results that can be used to create the SQL plan baseline.
  • C、The importance of SQL statements is based on the size of the objects accessed.
  • D、It generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.
  • E、It shows only the overall impact on workload and not the net SQL impact on workload.

正确答案:A,B,D

第10题：

Which three features work together, to allow a SQL statement to have different cursors for the samestatement based on different selectivity ranges?（）

  • A、Bind Variable Peeking
  • B、SQL Plan Baselines
  • C、Adaptive Cursor Sharing
  • D、Bind variable used in a SQL statement
  • E、Literals in a SQL statement

正确答案:A,C,E

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