ocp051题库笔记讲解-1z0-v9.02解析

1Z0-051V9.022017-5-11ViewtheExhibitandexaminethestructureofthePRODUCTSAllproductshavealistYouissuethefollowingcommandtodisplaythetotalpriceofeachproductafteradiscountof25%andataxof15%areappliedonit.Freightchargesof$100havetobeappliedtoalltheSQL>SELECTprod_name,prod_list_price-+(prod_list_price-(prod_list_price*(25/100))*(15/100))+100AS"TOTALPRICE"FROMWhatwouldbethe eifalltheparenthesesareremovedfromtheabovestatement?ItproducesasyntaxTheresultremainsThetotalpricevaluewouldbelowerthanthecorrectThetotalpricevaluewouldbehigherthanthecorrectAnswer:SELECTprod_name,prod_list_price-+(prod_list_price-(prod_list_price*(25/100))*(15/100))+100AS"TOTALPRICE"FROM ephotoDigital 17"LCDw/built-inHDTVTunerSELECTprod_name,prod_list_price-+prod_list_price-prod_list_price*25/100*15/100+100AS"TOTALPRICE"FROM5MPephotoDigital 17"LCDw/built-inHDTVTunerYouneedtoproduceareportwhereeachcustomer'screditlimithasbeenincrementedby$1000.Intheoutput,thecustomer'slastnameshouldhavetheheading'Name'andtheincrementedcreditlimitshouldbelabeled'NewCreditLimit'.Thecolumnheadingsshouldhaveonlythefirstletterofeachwordinuppercase.Whichstatement plishthisSELECTcust_last_nameName,cust_credit_limit+1000"NewCreditLimit"FROMSELECTcust_last_nameASName,cust_credit_limit+1000ASNewCreditLimitFROMSELECTcust_last_nameAS"Name",cust_credit_limit+1000AS"NewCreditLimit"FROMSELECTINITCAP(cust_last_name)"Name",cust_credit_limit+INITCAP("NEWCREDITFROMAnswer:selectnamefrom(select'wb'asnamefromdual)selectnamefrom(SELECT'WB'ASNAMEFROMDUAL);selectnamefrom(SELECT'WB'ASNameFROMDUAL)select"Name"from(SELECT'WB'AS"Name"FROMlastname列标题应显示为Name，并且增加的信贷限额列标题应显示为NewCreditLimit，列标题应该每个单词的首字母大写显示。ViewtheExhibitandexaminethestructureofthePRODUCTSYouneedtogenerateareportinthefollowing5MPDigitalPhotoCamera'scategoryisPhotoYBox'scategoryisElectronicsEnvoyAmbassador'scategoryisWhichtwoquerieswouldgivetherequiredoutput?(ChooseSELECTprod_name||q''||'scategoryis'||prod_categoryCATEGORIESFROMproducts;SELECTprod_name||q'['s]||'categoryis'|| FROMproducts;SELECTprod_name||q'\'s\'||'categoryis'||prod_categoryCATEGORIES FROMproducts;SELECTprod_name||q'<'s>'||'categoryis'||prod_categoryCATEGORIESFROMproducts;Answer:SELECT'''s'FROMSELECTq'\'s\',q'/'s/',q'('s)',q'{'s}',q'['s]',q'a'sa',q'1's1'FROMdual;selectq'\'s\'fromdual;selectselectq'\'s\'fromdual;select'wb'||'''s'fromdual;selectq'\'s\'fromdual;selectq'/'s/'fromdual;selectq'('s)'fromdual;selectq'['s]'fromdual;selectq'a'sa'fromdual;selectq'1's1'fromselectq'1weibin1'fromUsingtheCUSTOMERStable,youneedtogenerateareportthatshows50%ofeachcreditamountineach elevel.ThereportshouldNOTshowanyrepeatedcreditamountsineach elevel.Whichquerywouldgivetherequiredresult? e_level,DISTINCTcust_credit_limit*0.50AS"50%CreditLimit"FROMcustomers;SELECT e_level,DISTINCT*0.50AS"50%CreditLimit"FROMSELECT e_level||''||cust_credit_limit0.50AS"50%CreditLimit"FROM e_level||''||cust_credit_limit*0.50AS"50%CreditLimit"FROMcustomers;Answer:SELECTA,DISTINCTB,CFROM SELECTDISTINCTA,DISTINCTB,CFROMTAB4语法错SELECTDISTINCTA,B,CFROMTAB4SELECTAB,CFROMTAB4ViewtheExhibitandexaminethedataintheCUSTOMERStable.Evaluatethefollowingquery:SQL>SELECTcust_nameAS"NAME",cust_credit_limit/2ASMIDPOINT,MIDPOINT+100AS"MAXLOWERLIMIT"FROMTheabovequeryproducesanerroronexecution.Whatisthereasonfortheerror?AnaliascannotbeusedinanThealiasNAMEshouldnotbeenclosedwithindoublequotationmarks.TheMIDPOINT+100expressiongivesanerrorbecauseCUST_CREDIT_LIMITcontainsNULLvalues.ThealiasMIDPOINTshouldbeenclosedwithindoublequotationmarksfortheCUST_CREDIT_LIMIT/2expression.SELECTcust_nameAS"NAME",cust_credit_limit/2ASMIDPOINT,MIDPOINT+100AS"MAXLOWERLIMIT"FROMORA-00904:"MIDPOINT":invalidSELECTc.cust_last_nameAS"NAME",cust_credit_limit/2ASMIDPOINT,cust_credit_limit/2+100AS"MAXLOWERLIMIT"FROMcustomersc;selectnamefromselect'web'asNamefromselect"Name"fromselect'web'as"Name"from--以下几种方式都可select"NAME"fromSELECTc.cust_last_nameAS"NAME",cust_credit_limit/2ASMIDPOINT,cust_credit_limit/2+100AS"MAXLOWERLIMIT"FROMcustomersc)selectselectNAMEfromSELECTc.cust_last_nameAS"NAME",cust