Choosetwo.Examinethispartialcommand:CREATETABLEcust(cust_idNUMBER(2),credit_limitNUMBER(10))ORGANIZATIONEXTERNALWhichtwoclausesarerequiredforthiscommandtoexecutesuccessfully?A)theDEFAULTDIRECTORYclaus
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其他好文 时间:
2019-10-25 16:11:57
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134
ChoonethreeExaminethedescriptionofthePRODUCTStable:NameNull?TypePRODUCT_IDNOTNULLNUMBER(2)PRODUCT_NANEVARCHAR2(10)UNIT_PRICENUMBER(3)PURCHARGEVARCHAR2(2)EXPIRY_DATEDATEDELIVERY_DATEDATEWhichthreequere
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其他好文 时间:
2019-10-25 14:52:18
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89
Choosetwo.ExaminethisSQLstatement:UPDATEordersoSETcustomer_name=(SELECTcust_last_nameFROMcustomersWHEREcustomer_id=o.customer_id);Whichtwoaretrue?A)ThesubqueryisexecutedbeforetheUPDATEstatementisexecu
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其他好文 时间:
2019-10-23 16:30:16
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87
Choosethebestanswer.Examinethisquery:SELECTTRUNC(ROUND(156.00,-2),-1)FROMDUAL;Whatistheresult?A)16B)160C)150D)200E)100Answer:D(解析:关键就是round函数,0是小数点左边第一位,以此类推。)
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其他好文 时间:
2019-10-23 15:14:43
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96
ChoonetwoWhichthreestatementsaretrueaboutdroppingandunusedcolumnsinanOracledatabase?A)AprimarykeycolumnreferencedbyanothercolumnasaforeignkeycanbedroppedifusingtheCASCADEoption.B)ADROPCOLUMNcommandcan
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其他好文 时间:
2019-10-21 13:19:04
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66
Choosetwo.Whichtwostatementsaretrueaboutaselfjoin?A)Thejoinkeycolumnmusthaveanindex.B)Itcanbealeftouterjoin.C)Itmustbeafullouterjoin.D)Itcanbeaninnerjoin.E)Itmustbeanequiejoin.Answer:BD(自连接其实跟两张表的连接一样
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其他好文 时间:
2019-10-21 11:40:46
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104
ChoosetwoWhichtwostatementsaretrueaboutOraclesynonyms?A)Asynonymcanhaveasynonym.B)Allprivatesynonymnamesmustbeuniqueinthedatabase.C)AnyusercancreateaPUBLICsynonym.D)Asynonymcanbecreatedonanobjectinapa
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其他好文 时间:
2019-10-18 15:30:39
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122
ChoosethreeWhichthreestatementsaretrueaboutviewsinanOradebatabase?A)ASELECTstatementcannotcontainawhereclausewhenqueryingaviewcontaningaWHEREclauseinitsdefiningqueryB)Rowsinsertedintoatableusingaviewa
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其他好文 时间:
2019-10-18 10:53:57
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134
ChoosethreeWhichthreearetrueaboutgrantingobjectprivilegesontables,views,andsequences?A)UPDATEcanbegrantedonlyontablesandviews.B)DELETEcanbegrantedontables,views,andsequences.C)REFERENCEScanbegrantedon
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其他好文 时间:
2019-10-17 10:30:16
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96
choosethreeWhichthreestatementsaretrueaboutindexesandtheiradministrationinanOradedatabase?A)AnINVISIBLEindexisnotmaintainedwhenDataManipulationLanguage(DML)isperformedonitsunderlyingtable.B)Anindexcan
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其他好文 时间:
2019-10-16 11:35:22
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101