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Consider the following:Which statement best describes the meaning of the value for the key_len column？（）

Consider the following:Which statement best descri

A.It shows the total size of the index row

B.It shows how many columns in the index are examined

C.It shows the number of characters indexed in the key

D.It shows how many bytes will be used from each index row

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更多“Consider the following:Which s…”相关的问题

第1题

InyourSupportcenter.cndatabaseservertheparameterPLSQL_CODE_TYPEhasbeensettoNATIVE.Whichobjectwouldbeachievedbythesetting？（）

A.ThesourcePL/SQLcodewillbestoredinnativemachinecode.

B.ThesourcePL/SQLcodewillbestoredininterpretedbytecode.

C.ThecompiledPL/SQLcodewillbestoredinnativemachinecode.

D.ThecompiledPL/SQLcodewillbestoredininterpretedbytecode.

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第2题

YourSPFILEcontainsthefollowingparametersettings：

SGA_TARGET=8G

DB_CACHE_SIZE=4G

SHARED_POOL_SIZE=2G

LARGE_POOL_SIZE=512M

JAVA_POOL_SIZE=512M

LOG_BUFFER=100M

SGA_MAX_SIZE=10G

YouquerytheV$SGA_DYNAMIC_COMPONENTSdynamicperformanceviewanddiscoverthatthelargepoolcomponentiscurrentlysizedat1G.YouwantthevalueoftheSGA_TARGETinitializationparameterto10G，butinsteadofspecifyingavalueof10GfortheSGA_TARGETinitializationparameter，youerroneouslyexecutethefollowingstatement：

SQL>ALTERSYSTEMSETSGA_TARGET=0SCOPE=BOTH；

Whatistheresultofthisstatement？（）

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第3题

Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement?（）

A. NLS_LANG

B. NLS_COMP

C. NLS_SORT

D. None of the above

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第4题

YousetthevalueoftheSGA_TARGETinitializationparameterto1GtoenableOracletoautomaticallyresiz

emostofthememorycomponentsaccordingtothecurrentworkloadinthedatabase.Youissuethefollowingstatement：SQL>SELECTname，value，isdefault2FROMv$parameter3WHEREnameLIKE’%size%’；TheoutputofthisstatementdisplaysthattheDB_CACHE_SIZE，SHARED_POOL_SIZE，LARGE_POOL_SIZE，andJAVA_POOL_SIZEinitializationparameterscontainazerovalue.Whatdoesthisimply？（）

A.TheSGA_TARGETinitializationparametercannotbesettoavaluelessthan1G

B.TheSGA_TARGETinitializationparametercannotbesettoavaluegreaterthan1G

C.TheMemoryAdvisoroftheOracleEnterpriseManager10gcannotbeusedtoobtainadviceontheimportantmemorycomponentsoftheSGA

D.ThevaluesoftheDB_CACHE_SIZE，SHARED_POOL_SIZE，LARGE_POOL_SIZE，andJAVA_POOL_SIZEinitializationparameterscannotbesetmanually.

E.NominimumlimitsareimposedontheDB_CACHE_SIZE，SHARED_POOL_SIZE，LARGE_POOL_SIZE，andJAVA_POOL_SIZEinitializationparameters.

F.TheAutomaticSharedMemoryManagementfeaturecannotbedisabledunlessyouspecifyvaluesfortheDB_CACHE_SIZE，SHARED_POOL_SIZE，LARGE_POOL_SIZE，andJAVA_POOL_SIZEinitializationparametersintheinitializationparameterfile.

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第5题

YouworkasadatabaseadministratorforSupportcenter.cn.UsersintheSupportcenter.cnPRODdatabasec

omplainabouttheslowresponseoftransactions.Whileinvestigatingthereasonyoufindthatthetransactionsarewaitingfortheundosegmentstobeavailable，andundoretentionhasbeensettozero.Whatwouldyoudotoovercomethisproblem？（）

A.Increasetheundoreturn

B.Createmoreundosegments

C.Createanotherundotablespace

D.Increasethesizeoftheundotablespace

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第6题

Which of the following would be affected by setting NLS_LENGTH_SEMANTICS=CHAR?（）

A. All objects in the database

B. Tables owned by SYS and SYSTEM

C. Data dictionary tables

D. NCHAR columns

E. CHAR columns

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第7题

ThedatabaseinstanceiscurrentlyusingSPFILE.View&e

ThedatabaseinstanceiscurrentlyusingSPFILE.ViewtheExhibitandexaminetheerrorthatyoureceivedwhilerunningtheDBStructureIntegritycheck.Givenbelowarethestepstorecoverfromtheerrorinrandomorder：

1.Shutdowntheinstance，ifnotalreadydone.

2.Copyoneoftheremainingcontrolfilestoanewlocation.

3.ChangethevalueoftheCONTROL_FILESinitializationparametertocorrespondtothenewlocationofthecontrolfiles.

4.StartupthedatabaseinstancetotheNOMOUNTstage.

5.Recoverthedatabasetothepointoffailureofthecontrolfile.

6.Openthedatabase.

Identifythecorrectsequenceofsteps（）