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稳定性选择(名词解释)

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成穗率(名词解释)

Mediarecoverycansometimesbestoppedbytheinabilitytoreadpastacertainpointintheredostream.Thisisoftenreferredtoasstuckrecovery”.BeforeOracle9i,the
DatabaseAdministratorhadfewoptionstodealwithstuckrecovery.Ifthecorruptredocouldnotberecoveredfromsomeothersource,thenalltransactionsthatcommittedafterthecorruptpointintheredosteamwouldbelost.
Oracle9ichangesthatwiththeTrialRecoveryfeature.TrialRecoverisusedtotesttheapplicationoftheredologstothedatabase.
WhatarethreeothercharacteristicsofTrialRecovery()

超显性假说(名词解释)

植物新品种的新颖性(名词解释)

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