OCP-1Z0-053-V13.02-276题

276.The following command is executed to create the baseline template:

SQL> EXECUTE

DBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATE(START_TIME=>

TO_TIESTAMP(SYSDATE+2),

END_TIME=>TO_TIMESTAMP(SYSDATE+10),

BASELINE_NAME=>'Mybase4',

TEMPLATE_NAME=>'Mytemp4',

EXPIRATION=>NULL);

Which statement is true about the effect of the above command?

A. It creates a baseline template that never expires.

B. It produces an error because no snapshot information is provided to create the baseline.

C. It creates a baseline template that expires after the Automatic Workload Repository (AWR) retention period.

D. It creates a repeating baseline template that repeats after the Automatic Workload Repository (AWR) retention period.

Answer: A

答案解析：

参考:http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_workload_repos.htm#ARPLS69131

Parameters

Table 162-24 CREATE_BASELINE_TEMPLATE Procedure Parameters

Parameter	Description
start_time	Start Time for the baseline to be created'
end_time	End Time for the baseline to be created
baseline_name	Name of baseline to be created
template_name	Name for the template
expiration	Expiration in number of days for the baseline. If NULL, then expiration is infinite, meaning do not drop baseline ever. Defaults to NULL
dbid	Database Identifier for baseline. If NULL, this takes the database identifier for the local database. Defaults toNULL.
day_of_week	Day of week that the baseline should repeat on. Specify one of the following values: SUNDAY, MONDAY, TUESDAY,WEDNESDAY, THURSDAY, FRIDAY, SATURDAY.
hour_in_day	Value of 0-23 to specify the Hour in the Day the baseline should start
duration	Duration (in number of hours) after hour in the day that the baseline should last
baseline_name_prefix	Name for baseline prefix. When creating the baseline, the name of the baseline will be the prefix appended with the date information.