26. Exhibit:
A.set retenton target;
Alter system set DB_Flashback_Retention_target=4320;
B:Enable Flashback Database;
Alter database flashback on;
C mount the database
startup mount exclusive
D shutdown the instance
shutdown immediate
E open the database
alter database open
You want to configure the Flashback Database feature and retain flash
back logs for three days.
The steps used in this process are displayed in the exhibit.
In what sequence would you need to perform. these steps to enable the
Flashback Database feature?
A. D, C, A, B, E
B. D, A, C, B, E
C. B, D, C, E, A
D. D, B, E, C, A
Answer: A
flashback database的步骤是关闭数据库 启动到挂载exclusive 修改retention餐宿启动闪回数据库,打开数据库到open
独占和共享启动
独占启动的选项是exclusive,表示只允许一个例程使用该数据库;共享启动的参数是shared,表示允许多个例程并行使用该数据库,即将数据库装入多个现场
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