计算机专业英语第四章.ppt

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1、Introduction of Database Management SoftwareSummarization of Database计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURLesson One Summarization of DatabasevAdatabasemaybedefinedasacollectioninterrelateddatastoredtogetherwithaslittleredundancyaspossibletoserveoneormoreapplicationsinanoptimalfashion.vbed

2、efinedasvinterrelatedvredundancyvoptimalfashion把定义为adj.相关的n.冗余最理想的方式计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvIntroduction to Relational DatabasevSyntactically,theinformationthatafieldcontainsconformstoacertaintype,suchasareal,aninteger,acharacterorastring.Semantically,themeaningofinformationw

3、ithinafieldcorrespondstotheconceptorattributerepresentedbythefield.计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvsyntactically语法上vfield字段vInteger整型vSemantically语义上vcorrespondsto与相对应vconcept概念vattribute属性vrepresent表示，象征计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvTherelationaldatabasemodelfollow

4、edonfromhierarchicalandnetworkdatabasesandispresentlythemostwidelyuseddatamodelfordatabase.Priorto1970,mainframedatabaseapplicationsweredominatedbynetworkandhierarchicalmodels.计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvrelationaldatabasemodel关系数据库模型vfollowon跟随，继承，在之后vhierarchical层次的vpresently目前

5、，不久vwidely广泛地vpriorto在之前，优先于vdominate支配，统治计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvrelationship关系，关联vwidespread广泛的vacceptance接受，容忍vstraightforward正直的，易懂的vconceptual概念上的valgebra代数vscheme计划；阴谋，安排vbeconstructedfrom由构成vgovern统治，支配，管理计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURData Base Managem

6、ent System(DBMS)Data Base Management System(DBMS)vThesystemsoftwarepackagethathandlesthedifficulttasksassociatedwithcreating,accessingandmaintainingdatabaserecordsiscalledadatabasemanagementsystem(DBMS).ADBMSwillusuallybehandlingmultipledatacallsconcurrently.计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNI

7、T FOURvpackagen.包裹，包vhandlen.柄,手感；vt.触摸,处理,操作vi.搬运,易于操纵；n.计句柄vcreatingvt.创造,创作,造成vaccessn.通路,入门；vt.存取,接近vmaintainvt.维持,维修,继续,供养,主张vmultipleadj.多样的；n.倍数,若干；v.成倍增加vconcurrentlyadv.并发地计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvManagement Information System(MIS)vproceduresn.程序，手续vPurposen.目的，意图；vt.

8、打算，企图vgenerallyspeaking一般而言vresponsibilityn.责任，职责vobtainevt.获得，得到计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURStructured Query Language(SQL)vSQLisadatabaseprocessinglanguageendorsedbytheAmericanNationalStandardsInstitute.Withitssimple,powerfulsyntax,SQLrepresentsagreatprogressindatabaseaccessforal

9、llevelsofmanagementandcomputingprofessionals.计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvendorsevt.背书，认可vinstituten.学会,学院,协会vvt.创立,开始,制定,开始(调查),提起(诉讼)vsyntaxn.语法，句法vprofessionaln.自由职业者,专业人员；adj.专业的,职业的计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvformn.形状,形式；v.形成,排列vinteractiveadj.交互式的vembedde

10、dadj.嵌入的vtraditionaladj.传统的vadhoc特别vimmediatelyadv.立即，直接地计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURv1.Understandingeachotherisessentialforagoodrelationship.相互理解是维持良好关系的关键所在。v2.Spendingmoneyiseasierthanmakingmoney.花钱比赚钱容易。v3.LearningEnglishneedspersistence.学英语要持之以恒。v4.Youaregreat!你真棒！v5.Youarecr

11、azy.你疯了！v6.Youarehopeless!你没救了！v7.Hey!Youareabighelp.嘿！你真是帮了个大忙。v8.Youarealoser!你输定了！英语口语练习材料英语口语练习材料英语口语练习材料英语口语练习材料计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURLesson Two Introduction of Visual Foxpro 9.0vVisual Foxpro 9.0 OverviewvWithitslocalcursorengine,tightcouplingbetweenlanguageanddata,and

12、powerfulfeatures,VisualFoxPro9.0isagreattoolforbuildingdatabasesolutionsofallsizes.vcursorenginetight指针引擎紧的，紧密的计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvItsdata-centric,object-orientedlanguageoffersdevelopersarobustsetoftoolsforbuildingdatabaseapplicationsforthedesktop,client-serverenvironment

13、s,ortheWeb.vdata-centricobject-oriented以数据为中心面向对象的计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvDeveloperswillhavethenecessarytoolstomanagedatafromorganizingtablesofinformation,runningqueries,andcreatinganintegratedrelationaldatabasemanagementsystem(DBMS)toprogrammingafully-developeddatamanagement

14、applicationforendusers.计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvIm not having it all cut offvBillworkedinabigofficeinthecity,andheusedtogotothebarbersduringworkinghourstohavehishaircut,althoughthiswasagainsttherule:clerkshadtohavetheirhaircutintheirowntime.vWhilebillwasatthebarbersoneday,them

15、anageroftheofficecameinbychancetohavehisownhaircut.Billsawhimandtriedtohidehisface,butthemanagerrecognizedhim.英语幽默笑话英语幽默笑话计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURv“Hello,bill,”saidthemanager,“Iseethatyouarehavingyourhaircutinofficetime.”v“Yes,sir,Iam,”Billsaidcalmly,“Yousee,sir,itgrowsinoffic

16、etime.”v“Notallofit,”saidthemanageratonce,“Someofitgrowsinyourowntime.”v “Yes,sir,but Im not having it all cut off.”计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURLesson Three SQL Server 2000vSQL Server 2000 Product OverviewvBusinesstodaydemandsadifferentkindofdatamanagementsolution.SQLServer2000pro

17、videstheenterprisedatamanagementplatformyourorganizationneedstoadaptquicklyinafast-changingenvironment.voverview一般观点，总的看法计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURvWiththelowestimplementationandmaintenancecostsintheindustry,SQLServer2000deliversrapidreturnonyourdatamanagementinvestment.SQLServe

18、r2000supportstherapiddevelopmentofenterprise-classbusinessapplicationsthatcangiveyourcompanyacriticalcompetitiveadvantage.vinvestmentn.投资，可获利的东西计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOUR1.Match the following terms to the appropriate definition.v_databasev_DBMSv_Networkstructureapproachv_Relatio

19、nalstructureapproachv_Hierarchicalstructureapproach计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURStorageofdatainwhichrecordsarelinkedtogetherbytheuseofpointers.Acollectionofinterrelateddatastoredtogethertoserveoneormoreapplications.Storageofdatainwhichrecordsaredividedintoaninvertedtreebasedonmaster/subordinatefieldrelationship.计算机专业英语计算机专业英语计算机专业英语计算机专业英语 UNIT FOURUNIT FOURSoftwarethatorganize,manipulates,andretrievesdatastoredinadatabase.Storageofdatainwhichhorizontalrowsdesignaterecordsandverticalcolumnsdesignatefields.