题意分析 首先$\%\%\%\%olinr$以及花_Q$julao$当场切题 然后就是怎么求 $$max(|a A|,|b B|)=max(a A,A a,B b,b B)$$ 我们令$x_1=(a+b)/2,x_2=(A+B)/2,y_1=(a b)/2,y_2=(A B)/2$ $$max(x_ ...
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2019-03-29 21:04:38
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161
79、Whichstatementistrueabouttransactions?A.AsetofDataManipulationLanguage(DML)statementsexecutedinasequenceendingwithaSAVEPOINTformsasingletransaction.B.EachDataDefinitionLanguage(DDL)statementexecute
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2019-03-18 15:31:38
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190
80、ViewtheexhibitandexaminethestructureinORDERSandORDER_ITEMStables.YouneedtocreateaviewthatdisplaystheORDER_ID,ORDER_DATE,andthetotalnumberofitemsineachorder.WhichCREATEVIEWstatementwouldcreatethevie
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2019-03-18 15:17:16
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143
77、Whichtwostatementsaretrueaboutsequencescreatedinasingleinstancedatabase?(Choosetwo.)A.WhentheMAXVALUElimitforthesequenceisreached,youcanincreasetheMAXVALUElimitbyusingtheALTERSEQUENCEstatement.B.DE
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2019-03-18 11:51:42
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148
78、ViewtheexhibitandexaminethestructureoftheCUSTOMERStable.Whichtwotaskswouldrequiresubqueriesorjoinstobeexecutedinasinglestatement?A.findingthenumberofcustomers,ineachcity,whosecreditlimitismorethant
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2019-03-18 11:42:05
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77、Which two statements are true about sequences created in a single instance database? (Choose two.) A. When the MAXVALUElimit for the sequence is re ...
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2019-03-18 10:21:12
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76、ViewtheexhibitandexaminethedescriptionoftheDEPARTMENTSandEMPLOYEEStables.TheretrievedataforalltheemployeesfortheirEMPLOYEE_ID,FIRST_NAME,andDEPARTMENTNAME,thefollowingSQLstatementwaswritten:SELECTe
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2019-03-11 17:34:05
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283
75、Whichstatementsarecorrectregardingindexes?(Chooseallthatapply.)A.Anon-deferrablePRIMARYKEYorUNIQUEKEYconstraintinatableautomaticallyattemptstocreatesauniqueindex.B.Indexesshouldbecreatedoncolumnsth
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2019-03-11 14:59:39
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74、View the exhibit and examine the structure of ORDERS and CUSTOMERS tables. ORDERS Name Null? Type ORDER_ID NOT NULL NUMBER(4) ORDER_DATE NOT NULL D ...
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2019-03-11 13:15:55
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74、ViewtheexhibitandexaminethestructureofORDERSandCUSTOMERStables.ORDERSNameNull?TypeORDER_IDNOTNULLNUMBER(4)ORDER_DATENOTNULLDATEORDER_MODEVARCHAR2(8)CUSTOMER_IDNOTNULLNUMBER(6)ORDER_TOTALNUMBER(8,2)
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2019-03-11 13:05:19
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