OCP-1Z0-053-V12.02-666题

666.You are working in an online transaction processing (OLTP) environment. You use the

FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK

TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS

table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the

FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of

the FLASHBACK TABLE command?

A. Restore the backup control file and open the database with RESETLOGS option.

B. Perform point-in-time recovery because flashback cannot be performed again on this table

C. Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN

663571

D. Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN

663571

Answer: D

答案解析：

参考：闪回表：http://blog.csdn.net/rlhua/article/details/12404577

可以再次使用闪回表返回之前的状态。

FLASHBACKTABLECUSTOMERS TOSCN 663571;