试题详情
- 单项选择题You are working on an online transaction processing （OLTP） system. You notice that a PL/SQL procedure got executed twice at 2） 00 p.m. This has incorrectly updated the EMP_SAL table. How would you revert the table to its state at 2） 00 p.m.？（）
A、Perform point-in-time recovery to 2： 00 p.m.
B、Use Flashback Table feature to revert the changes.
C、Restore the entire database from the recent backup and open it.
D、Issue the rollback statement with system change number （SCN）.
- B
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