计算机专业英语第四章.ppt

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1、Introduction of Database Management Software,Summarization of Database,Lesson One Summarization of Database,A database may be defined as a collection interrelated data stored together with as little redundancy as possible to serve one or more applications in an optimal fashion.be defined as interrel

2、ated redundancyoptimal fashion,把定义为,adj.相关的,n.冗余,最理想的方式,Introduction to Relational DatabaseSyntactically,the information that a field contains conforms to a certain type,such as a real,an integer,a character or a string.Semantically,the meaning of information within a field corresponds to the concep

3、t or attribute represented by the field.,syntactically 语法上field 字段Integer 整型Semantically 语义上corresponds to 与相对应concept 概念attribute 属性represent 表示，象征,The relational database model followed on from hierarchical and network databases and is presently the most widely used data model for database.Prior t

4、o 1970,mainframe database applications were dominated by network and hierarchical models.,relational database model 关系数据库模型follow on 跟随，继承，在之后hierarchical 层次的presently 目前，不久widely 广泛地prior to 在之前，优先于dominate 支配，统治,relationship 关系，关联widespread 广泛的acceptance 接受，容忍straightforward 正直的，易懂的conceptual 概念上的

5、algebra 代数scheme 计划；阴谋，安排be constructed from 由构成govern 统治，支配，管理,Data Base Management System(DBMS),The system software package that handles the difficult tasks associated with creating,accessing and maintaining data base records is called a database management system(DBMS).A DBMS will usually be hand

6、ling multiple data calls concurrently.,package n.包裹，包handle n.柄,手感；vt.触摸,处理,操作 vi.搬运,易于操纵；n.计句柄creating vt.创造,创作,造成access n.通路,入门；vt.存取,接近maintain vt.维持,维修,继续,供养,主张multiple adj.多样的；n.倍数,若干；v.成倍增加concurrently adv.并发地,Management Information System(MIS)procedures n.程序，手续Purpose n.目的，意图；vt.打算，企图generall

7、y speaking 一般而言responsibility n.责任，职责obtaine vt.获得，得到,Structured Query Language(SQL)SQL is a database processing language endorsed by the American National Standards Institute.With its simple,powerful syntax,SQL represents a great progress in database access for all levels of management and computin

8、g professionals.,endorse vt.背书，认可institute n.学会,学院,协会vt.创立,开始,制定,开始(调查),提起(诉讼)syntax n.语法，句法professional n.自由职业者,专业人员；adj.专业的,职业的,form n.形状,形式；v.形成,排列interactive adj.交互式的embedded adj.嵌入的 traditional adj.传统的ad hoc 特别immediately adv.立即，直接地,1.Understanding each other is essential for a good relationshi

9、p.相互理解是维持良好关系的关键所在。2.Spending money is easier than making money.花钱比赚钱容易。3.Learning English needs persistence.学英语要持之以恒。4.You are great!你真棒！5.You are crazy.你疯了！6.You are hopeless!你没救了！7.Hey!You are a big help.嘿！你真是帮了个大忙。8.You are a loser!你输定了！,英语口语练习材料,Lesson Two Introduction of Visual Foxpro 9.0,Visu

10、al Foxpro 9.0 Overview With its local cursor engine,tight coupling between language and data,and powerful features,Visual FoxPro 9.0 is a great tool for building database solutions of all sizes.cursor engine tight,指针引擎,紧的，紧密的,Its data-centric,object-oriented language offers developers a robust set o

11、f tools for building database applications for the desktop,client-server environments,or the Web.data-centric object-oriented,以数据为中心,面向对象的,Developers will have the necessary tools to manage datafrom organizing tables of information,running queries,and creating an integrated relational database manag

12、ement system(DBMS)to programming a fully-developed data management application for end users.,Im not having it all cut offBill worked in a big office in the city,and he used to go to the barbers during working hours to have his hair cut,although this was against the rule:clerks had to have their hai

13、r cut in their own time.While bill was at the barbers one day,the manager of the office came in by chance to have his own hair cut.Bill saw him and tried to hide his face,but the manager recognized him.,英语幽默笑话,“Hello,bill,”said the manager,“I see that you are having your haircut in office time.”“Yes

14、,sir,I am,”Bill said calmly,“You see,sir,it grows in office time.”“Not all of it,”said the manager at once,“Some of it grows in your own time.”“Yes,sir,but Im not having it all cut off.”,Lesson Three SQL Server 2000,SQL Server 2000 Product OverviewBusiness today demands a different kind of data mana

15、gement solution.SQL Server 2000 provides the enterprise data management platform your organization needs to adapt quickly in a fast-changing environment.overview,一般观点，总的看法,With the lowest implementation and maintenance costs in the industry,SQL Server 2000 delivers rapid return on your data manageme

16、nt investment.SQL Server 2000 supports the rapid development of enterprise-class business applications that can give your company a critical competitive advantage.investment,n.投资，可获利的东西,1.Match the following terms to the appropriate definition._database_DBMS_Network structure approach_Relational str

17、ucture approach_Hierarchical structure approach,Storage of data in which records are linked together by the use of pointers.A collection of interrelated data stored together to serve one or more applications.Storage of data in which records are divided into an inverted tree based on master/subordinate field relationship.,Software that organize,manipulates,and retrieves data stored in a database.Storage of data in which horizontal rows designate records and vertical columns designate fields.,