WhichstatementistrueregardingFlashbackVersionQuery?()
A. Itreturnsversionsofrowsonlywithinatransaction.
B. ItcanbeusedinsubqueriescontainedonlyinaSELECTstatement.
C. ItwillreturnanerroriftheundoretentiontimeislessthanthelowerboundtimeorSCNspecified.
D. Itretrievesallversionsincludingthedeletedaswellassubsequentlyreinsertedversionsoftherows.
查看答案
科学共同体是指()
A. 某一领域科学研究的共同问题
B. 某一历史时期科学研究的共同范式
C. 某一领域有共同研究范式的科学家集团
D. 科学研究与应用一体化机制
Aredologfileiscorruptedwhilethedatabaseisopen;asaconsequence,databaseoperationsarestoppedbecausearchivingcannotcontinue.Whatwouldyoudotosolvetheproblem?()
A. cleartheredologgroup
B. performredologfileimport
C. performanincompleterecovery
D. performaredologrecoveryusingRecoveryManager(RMAN)
E. shutdownthedatabaseandopenthedatabaseintheNOARCHIVELOGmode
WhichtwostatementsaretrueaboutinteroperatingwithOracleAQJMSwithOracleWebLogicserver?()
A. Ifyouselectanon-XAJDBCdriver,youcanuseWebLogicAQJMSinbothlocal&globaltransactions
B. OracleWebLogicServerrequiresaJDBCdrivertocommunicatewiththeOracleAQJMS
C. OracleWebLogicAQJMSstand-aloneclientautomaticallyparticipateinglobaltransactionsmanagedbyOracleWebLogicServer
D. IfyouselectanXAJDBCdriver,youcanuseWebLogicAQJMSinbothlocalandglobaltransactions
科学理论建构过程中,最常用的逻辑方法是()
A. 归纳法
B. 演绎法
C. 类比法
D. 移植法