题目内容（请给出正确答案）

[主观题]

ViewtheExhibitandexaminethestructureoftheORDERSandORDERJTEMStables.EvaluatethefollowingSQL

statement：SELECToi.order_id，product_jd，order_dateFROMorder_itemsoiJOINordersoUSING（order_id）；WhichstatementistrueregardingtheexecutionofthisSQLstatement？（）

ViewtheExhibitandexaminethestructureoftheORDERSand

A.ThestatementwouldnotexecutebecausetablealiasesarenotallowedintheJOINclause.

B.ThestatementwouldnotexecutebecausethetablealiasprefixisnotusedintheUSINGclause.

C.ThestatementwouldnotexecutebecauseallthecolumnsintheSELECTclausearenotprefixedwithtablealiases.

D.ThestatementwouldnotexecutebecausethecolumnpartoftheUSINGclausecannothaveaqualifierintheSELECTlist.

查看答案

如搜索结果不匹配，请联系老师获取答案

您可能会需要：

重置密码查看订单联系客服

安装上学吧APP，拍照搜题省时又省心！

更多“ViewtheExhibitandexaminethestr…”相关的问题

第1题

YouworkasadatabaseadministratorforCertkiller.com.InyourOracledatabase10ginstallationyouhavesetORACLE_BASEto/u01/app/oracle.Whichobjectivewillbeachievedbythissetting？（）

A.TheOraclekernelwillbeplacedinthislocation.

B.TheOraclesoftwarewillbeplacedinthislocation.

C.Theserverparameterfile（SPFILE）willbeplacedinthislocation.

D.Thedatabasefileswillbeplacedinthislocation，ifnotspecifiedexplicitly.

E.ThelocationwillbeconsideredforthebaseofOracleManagedFiles（OMF）.

F.ThelocationwillbeconsideredforthebaseofOptimalFlexibleArchitecture（OFA）.

点击查看答案

第2题

Whichtwostatementsaretrueregardingtheexecutionofthecorrelatedsubqueries？（）

A.Thenestedqueryexecutesaftertheouterqueryreturnstherow.

B.Thenestedqueryexecutesfirstandthentheouterqueryexecutes.

C.Theouterqueryexecutesonlyoncefortheresultreturnedbytheinnerquery.

D.Eachrowreturnedbytheouterqueryisevaluatedfortheresultsreturnedbytheinnerquery.

点击查看答案

第3题

Which two statements are true about the use of the procedures listed in the vsysaux_occupants.move_procedure column?（）

A. The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace.

B. The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace.

C. All the components may be moved into SYSAUX tablespace.

D. All the components may be moved from the SYSAUX tablespace.

点击查看答案

第4题

TheoperatingsystemfilecratabintheLinuxplatformgetsupdatedwheneveryoucreateanewdatabaseonthesamehostmachine.Whatkindofinformationisstoredisstoredinthisfile？（）

A.OracleSIDsonly

B.Oraclehomesonly

C.Oracleinstalltimestamp

D.Oracleinventorypointerfiles

E.Oracledatabasecreationtimestamp

F.OracleSIDsandOraclehomesonly

G.OracleSIDs，Oraclehomesandflagforautostartup

点击查看答案

第5题

YouworkasadatabaseadministratorforCertkiller.com.Yourdatabaseisconfiguredforautomaticundom

anagement.UNDO_RETENTIONissetto3hours.Youwanttoflashbackatablethatwascreatedlastyear.Howfarbackcantheflashbackquerygo？（）

A.3hours

B.6months

C.untillastyear

D.untillastcommit

E.untilthepointwhentheundotablespacewasrefreshed

F.untilthedatabaseisshutdownandthememoryerased

点击查看答案

第6题

EvaluatetheCREATETABLEstatement：CREATETABLEproducts（product_idNUMBER（6）CONSTRAINTprod_id_pkPRIMARYKEY，product_nameVARCHAR2（15））；WhichstatementistrueregardingthePROD_ID_PKconstraint？（）

A.Itwouldbecreatedonlyifauniqueindexismanuallycreatedfirst.

B.Itwouldbecreatedandwoulduseanautomaticallycreateduniqueindex.

C.Itwouldbecreatedandwoulduseanautomaticallycreatednonuniqueindex.

D.Itwouldbecreatedandremainsinadisabledstatebecausenoindexisspecifiedinthecommand.

点击查看答案

第7题

Which statement is true about Oracle Net Listener?（）

A. It acts as the listening endpoint for the Oracle database instance for all local and non-local user connections.

B. A single listener can service only one database instance and multiple remote client connections.

C. Service registration with the listener is performed by the process monitor (PMON) process of each database instance.

D. The listener.ora configuration file must be configured with one or more listening protocol addresses to allow remote users to connect to a database instance.

点击查看答案

第8题

Youareperformingablockmediarecoveryonthetools01.dbfdatafileintheSALESdatabaseusingRMAN.Whichtwostatementsarecorrectinthisscenario？（）

A.YoumustensurethattheSALESdatabaseismountedoropen.

B.Youmustrestoreabackupcontrolfiletoperformablockmediarecovery.

C.Youmusttakethetools01.dbfdatafileofflinebeforeyoustartablockmediarecovery.

D.YoumustputthedatabaseinNOARCHIVELOGmodetoperformablockmediarecovery.

E.Youcanperformonlyacompletemediarecoveryofindividualblocks，point-in-timerecoveryof individualdatablocksisnotsupported.

点击查看答案

第9题

InyourCertkiller.comproductiondatabase，youfindthatthedatabaseusersareabletocreateandreadfi

leswithunstructureddata，availableinanylocationonthehostmachinefromanapplication.Youwanttorestrictthedatabaseuserstoaccessfilesinaspecificlocationonthehostmachine.Whatcoulddotoachievethis？（）

A.ModifythevaluefortheUTL_FILE_DIRparameterintheparameterfile

B.Grantreadandwriteprivilegeontheoperatingsystempathtothedatabaseusers

C.ModifythevaluefortheLDAP_DIRECTORY_ACCESSparameterintheparameterfile

D.ModifythevalueforthePLSQL_NATIVE_LIBRARY_DIRparameterintheparameterfile

E.Createadirectoryobjectreferringtotheoperatingsystempath，andgrantreadandwriteprivilegeonthedirectoryobjecttothedatabaseusers

点击查看答案

第10题

You are administering a database stored in Automatic Storage Management (ASM). You use RMA

N to back up the database and the MD_BACKUP command to back up the ASM metadata regularly. You lost an ASM disk group DG1 due to hardware failure.In which three ways can you re-create the lost disk group and restore the data?（）

A. Use the MD_RESTORE command to restore metadata for an existing disk group by passing the existing disk group name as an input parameter and use RMAN to restore the data.

B. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group and data on the disk group.

C. Use the MD_RESTORE command to restore the disk group with the changed disk group specification, failure group specification, name, and other attributes and use RMAN to restore the data.

D. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group name and same set of disks and failure group configuration, and use RMAN to restore the data.

E. Use the MD_RESTORE command to restore both the metadata and data for the failed disk group.

F. Use the MKDG command to add a new disk group DG1 with the same or different specifications for failure group and other attributes and use RMAN to restore the data.

点击查看答案