题目内容

You are working in an online transaction processing (OLTP) environment. You used the FLASHBACK TABLE 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 and the resultant changes are not what you had desired. So, you need to reverse the effects of the FLASHBACK TABLE command while ensuring that: a) No other user data in the database is affected. b) The operation takes the minimum possible time. Which option would you choose?()

A. Use ROLLBACK command with SCN 663571.
B. Perform Flashback Transaction Query with SCN 663571.
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.

查看答案
更多问题

小英子不喜欢宋妈的丈夫,一口黄板牙,就像他的()。

LA是位置区,RA是路由区,LA主要用于PS域,RA主要用于CS域。

A. 正确
B. 错误

城轨交通车辆段的主要设备包括()、()、()、()、()和()。

升降机能在船舶横倾小于()度,纵倾小于()度状态下安全有效工作。

A. 2;5
B. 5;2
C. 5;3

答案查题题库