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1、Thecorrectbibliographiccitationforthismanualisasfollows:SASInstituteInc.2011.SAS®CertificationPrepGuide:BaseProgrammingforSAS®9,ThirdEdition.Cary,NC:SASInstituteInc.SAS®CertificationPrepGuide:BaseProgrammingforSAS®9,ThirdEdition.Copyright©2011,SASInstituteInc.,Cary,NC,US
2、AISBN978-1-60764-924-3Allrightsreserved.ProducedintheUnitedStatesofAmerica.Forahard-copybook:Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,orotherwise,withoutthepriorwrittenpermissio
3、nofthepublisher,SASInstituteInc.ForaWebdownloadore-book:Youruseofthispublicationshallbegovernedbythetermsestablishedbythevendoratthetimeyouacquirethispublication.U.S.GovernmentRestrictedRightsNotice:Use,duplication,ordisclosureofthissoftwareandrelateddocumentationbytheU.
4、S.governmentissubjecttotheAgreementwithSASInstituteandtherestrictionssetforthinFAR52.227-19,CommercialComputerSoftware-RestrictedRights(June1987).SASInstituteInc.,SASCampusDrive,Cary,NorthCarolina27513.1stprinting,July2011SAS®Publishingprovidesacompleteselectionofbooksan
5、delectronicproductstohelpcustomersuseSASsoftwaretoitsfullestpotential.Formoreinformationaboutoure-books,e-learningproducts,CDs,andhard-copybooks,visittheSASPublishingWebsiteatsupport.sas.com/publishingorcall1-800-727-3228.SAS®andallotherSASInstituteInc.productorservicena
6、mesareregisteredtrademarksortrademarksofSASInstituteInc.intheUSAandothercountries.®indicatesUSAregistration.Otherbrandandproductnamesareregisteredtrademarksortrademarksoftheirrespectivecompanies.®SASCertificationPrepGuideBaseProgrammingfor®SAS9,ThirdEditionTableofContent
7、sAboutThisBook.....................................................................................................................................................................2Chapter1BaseProgramming....................................................................
8、.............................................................................4Chapter2ReferencingFilesa
