By mistake， you ran the batch job （for updating the BILL_DETAILS table） twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify： a） A list of changes made along with the transaction identifier of each change. b） The necessary SQL statements to undo the erroneous changes. Which option would you choose？（） RMAN only.。 Flashback Table only.。 Flashback Version Query only.。 Flashback Database and Flashback Transaction Query.。 Flashback Version Query and Flashback Transaction Query.。
安拆费是指除（）外的施工机械在现场进行安装与拆卸所需的人工、材料、机械和试运转费用以及机械辅助设施的折旧、搭设、拆除等费用。 大型机械。 工程机械。 小型机械。 履带式机械。
To perform management activities， each domain requires its own（） Administration Server。 Configuration Wizard。 Ant Task。 Node Server。
训练目标为增强耐力时，一般采取的运动方法为（） 不断重复的被动运动方法。 所给负荷必须达到能使肌肉较快产生疲劳的水平，即负荷量应相当大。 动作重复次数比较少的运动。 重复次数较多而负荷量相对较小的练习方法。 尽量地加快动作进行速度的方法。
Your database instance is functional for the past one month. The Automatic Workload Repository（AWR） snapshot retention is set to 7 and the STATISTICS_LEVEL initialization parameter is set to TYPICAL. You receive a complaint about the poor performance of the database between 7 PM and 9 PM of theprevious day. Choose two actions any of which can be referred to first to diagnose the problem. （） Use the Active Session History report.。 Use the AWR Compare Periods report.。 Use an ADDM analysis between 7 PM and 9 PM of the previous day.。 Use the AWR Compare Period report between 7 PM and 9 PM of the previous day.。
Evaluate the SQL statement:
What will be displayed?（）
