单项选择题
A.alter database backup controlfile
B.alter database backup controlfile to trace
C.alter database controlfile backup
D.alter database controlfile backup to ’/ora01/oracle/ctrl_backup.ctl’
E.alter database begin controlfile backup
单项选择题 hichofthefollowingRMANstructurescandatafromadatafilespan?（）
单项选择题 Youcreatetworesourceplans,onefordatawarehouseloadingjobsatnightandtheotherforapplicationjobsatdaytime.Youwanttheresourceplanstoactivateautomaticallysothattheresourceallocationisoptimumasdesiredbytheactivity.Howwouldyouachievethis?（）
单项选择题 TheDB_BLOCK_CHECKINGinitializationparameterissettoOFF.数据库块检测初始化参数被设定为关Whichblockcheckingwouldbeperformed?（）