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043-186

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-10 11:21:29 0 删除 编辑
186. You want to configure the Flashback Database feature and retain
flashback logs for three days.
The steps used in this process are:
A.Set the retention target:
SQL> ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320.
B.Enable Flashback Database:
SQL> ALTER DATABASE FLASHBACK ON.
C.Mount the database:
SQL> STARTUP MOUNT EXCLUSIVE.
D.Shut down the instance:
SQL> SHUTDOWN IMMEDIATE.
E. Open the database:
SQL> ALTER DATABASE OPEN.
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
ALTER DATABASE FLASHBACK ON;
必须先配置数据库以进行归档,且必须在 MOUNT EXCLUSIVE 模式下启动数据库后,才
能发出此命令来启用闪回数据库。 所以C 选项必须在B 选项前面,可以排除法

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