未知题型 ExaminethefollowingstatementthatisusedtomodifytheprimarykeyconstraintontheSALEStable：SQL>ALTERTABLESALESMODIFYCONSTRAINTpkDISABLEVALIDATE；Whichthreestatementsaretrueregardingtheabovecommand（）

未知题型 YouwanttomigrateyourexistingnonASMfilestoASMfilesforthedatabasePROD.Whichmethodorcommandwouldyouusetoaccomplishthistask？（）

未知题型 Evaluatethefollowingcommandanditsoutput：SQL>SELECT*FROMdba_temp_free_space；TABLESPACE_NAMETABLESPACE_SIZEALLOCATED_SPACEFREE_SPACELMTEMP250609664101048576149561088Whichtwostatementscorrectlyinterprettheoutput？（）A.FREE_SPACEindicatesonlythespacethatiscurrentlyunallocated.B.ALLOCATED_SPACEindicatesonlythespacecurrentlyallocatedandinuse.C.FREE_SPACEindicatesonlythespacethatiscurrentlyallocatedandavailableforreuse.D.ALLOCATED_SPACEindicatesboththespacecurrentlyallocatedandused，andthespacethat isavailableforreuse.E.FREE_SPACEindicatesboththespacethatiscurrentlyallocatedandavailableforreuse，andthespacethatiscurrentlyunallocated.