题目内容

Youjustissuedthefollowingstatement:ALTERTABLESALESDROPCOLUMNPROFIT.WhichofthefollowingchoicesidentifieswhenthecolumnwillactuallyberemovedfromOracle？（）

A. Immediatelyfollowingstatementexecution
B. AftertheALTERTABLEDROPUNUSEDCOLUMNScommandisissued
C. AftertheALTERTABLESETUNUSEDCOLUMNcommandisissued
D. AftertheALTERTABLEMODIFYcommandisissued

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Youwanttoperforminincompleterecoveryofyourdatabase.Youplantousethesecommandstorecoveryourdatabase：SETUNTILTIME=’2000-12-09：11：44：00’；RESTOREDATABASE；RECOVERDATABASE；Howshouldthecommandsbeexecuted？（）

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CREATE，DROP，ALTER等命令属于下列哪类命令（）

A. DCL
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Youjustissuedthefollowingstatement:ALTERTABLESALESDROPCOLUMNPROFIT.WhichofthefollowingchoicesidentifieswhenthecolumnwillactuallyberemovedfromOracle？（）

A. Immediatelyfollowingstatementexecution B. AftertheALTERTABLEDROPUNUSEDCOLUMNScommandisissued C. AftertheALTERTABLESETUNUSEDCOLUMNcommandisissued D. AftertheALTERTABLEMODIFYcommandisissued

Youwanttoperforminincompleterecoveryofyourdatabase.Youplantousethesecommandstorecoveryourdatabase：SETUNTILTIME=’2000-12-09：11：44：00’；RESTOREDATABASE；RECOVERDATABASE；Howshouldthecommandsbeexecuted？（）

INSERT，UPDATE，DELETE等命令属于下列哪类命令（）

YouareabouttocreateyourOracledatadictionaryforusewiththedatabase.WhichofthefollowinguserswouldyouconnecttothedatabaseasforthispurposeinOracle9iandlaterreleases？（）

CREATE，DROP，ALTER等命令属于下列哪类命令（）

A. Immediatelyfollowingstatementexecution
B. AftertheALTERTABLEDROPUNUSEDCOLUMNScommandisissued
C. AftertheALTERTABLESETUNUSEDCOLUMNcommandisissued
D. AftertheALTERTABLEMODIFYcommandisissued