OCP-V13-040

QUESTION 40

Evaluate the following code:

SQL>VARIABLE task_name VARCHAR2(255); SQL>VARIABLE sql_stmt VARCHAR2(4000);

SQL>BEGIN :sql_stmt := ‘SELECT COUNT(*) FROM customers

WHERE cust_state_province =”CA”’;

:task_name := ‘MY_QUICKTUNE_TASK’;

DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR,

:task_name, :sql_stmt);

END;

What is the outcome of this block of code?

A. It creates a task and workload, and executes the task.

B. It creates a task and workload but does not execute the task.

C. It produces an error because a template has not been created.

D. It produces an error because the SQL Tuning Set has not been created.

Correct Answer: A

执行下面的代码

SQL>VARIABLE task_name VARCHAR2(255); SQL>VARIABLE sql_stmt VARCHAR2(4000);

SQL>BEGIN :sql_stmt := ‘SELECT COUNT(*) FROM customers

WHERE cust_state_province =”CA”’;

:task_name := ‘MY_QUICKTUNE_TASK’;

DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR,

:task_name, :sql_stmt);

END;

结果是什么

A.它创建一个任务和工作量，并执行任务。