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Considerthefollowingstatement:SQL>EXECUTEDBMS_STATS.GATHER_SHEMA_STATS(-2>ownname=>‘OE’,-3>estimate_percent=>DBMS_STATS.AUTO_SAMPLE_SIZE,-4>methodopt=>‘forallcolumnssizeAUTO’);Whatistheeffectof‘forallcolumnssizeAUTO’oftheMETHOD_OPToption?()

A.TheOracleservercreatesanewhistogrambasedonexistinghistogramdefinitionsforalltable,column,andindexstatisticsfortheOEschema.

B.TheOracleservercreatesahistogrambasedondatadistributionregardlessofhowtheapplicationusesthecolumn/sforalltable,column,andindexstatisticsfortheOEschema.

C.TheOracleservercreatesahistogrambasedondataandapplicationusageofthecolumn/sforalltable,column,andindexstatisticsfortheOEschema.

D.TheOracleservercreatesahistogrambasedonapplicationusage,regardlessofdatadistribution,foralltable,column,andindexstatisticsfortheOEschema.


参考答案

更多 “ Considerthefollowingstatement:SQLEXECUTEDBMS_STATS.GATHER_SHEMA_STATS(-2ownname=‘OE’,-3estimate_percent=DBMS_STATS.AUTO_SAMPLE_SIZE,-4methodopt=‘forallcolumnssizeAUTO’);Whatistheeffectof‘forallcolumnssizeAUTO’oftheMETHOD_OPToption?()A.TheOracleservercreatesanewhistogrambasedonexistinghistogramdefinitionsforalltable,column,andindexstatisticsfortheOEschema.B.TheOracleservercreatesahistogrambasedondatadistributionregardlessofhowtheapplicationusesthecolumn/sforalltable,column,andindexstatisticsfortheOEschema.C.TheOracleservercreatesahistogrambasedondataandapplicationusageofthecolumn/sforalltable,column,andindexstatisticsfortheOEschema.D.TheOracleservercreatesahistogrambasedonapplicationusage,regardlessofdatadistribution,foralltable,column,andindexstatisticsfortheOEschema. ” 相关考题
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