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You work as a database administrator at Certkiller .com. You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEEStable. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?()
什么叫敏感因素?
()服务方式主要面向重要客户。
用来鉴定DNA的技术是
金属丝的灵敏度Ks恒小于同一材料金属应变片的灵敏系数K。
假设某投资者在2015年12月31日,买入1股A公司股票,价格为100元,2016年12月 31日,A公司发放3元分红,同时股价为105元。那么持有区间收益率为( )。
前轮前束是指()。
待转运伤病员应由()评估后决定合适的转运方式,按伤病员病情安排人员护送。
与客人谈话时哪些做法是正确的。()
停机过程中,两台汽泵何时退出运行?
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