《讲数据库软件》PPT课件.ppt

2023/5/21,软件专业英语,1,第四讲 数据库软件（Database Software）,泸州职业技术学院信息工程系,2023/5/21,软件专业英语,2,教学目的与要求教学重点和难点,教学目的与要求：1、掌握有关数据库软件的专业术语2、了解数据库软件的概况3、了解数据库软件市场的盈利方式4、了解数据库软件的发展趋势教学重点和难点：1、数据库软件的相关术语2、数据库软件的概况、盈利方式和发展趋势,2023/5/21,软件专业英语,3,一、解释术语,2023/5/21,软件专业英语,4,二、讲解课文,第一段：数据库软件概述Database software stores and recalls information in fields in a systematic and organized way.It is like putting many boxes of files in apartments in an apartment building,each one has a specific address.When you want to go back later and retrieve the information,you just need to remember the address for the apartment you put it in.The main kinds are relational and flat file.The basic difference is that relational databases allow more complicated linking and display of data.They have a master file where information is entered,if the data in the master file changes it is updated throughout the whole database system automatically.In flat file database,linking and display of information in fields can only be done by special programming.,2023/5/21,软件专业英语,5,二、讲解课文,第二段：数据库软件市场如何盈利Money is made on the sale or rental of database software licenses,and on the development and customization of databases for use in specific businesses.For many businesses,their database is the heart of their operation.For example,in insurance and banking,the numbers and names in their database are their business.Without these,they have no business.The current state of the industry is that database software is usually hosted on a server on a corporate network or the Internet.Information is requested or queried by clients to the server,and sent back for display on the local monitor or screen.In systems like this,SQL(Structured Query Language)statements are usually sent to a DBMS(Database Management System)application that then retrieves the information and sends it back to whatever made the request.,2023/5/21,软件专业英语,6,二、讲解课文,第三段：数据库软件的发展趋势Recent trends in the industry include the movement to databases that can be accessed over the Internet,and database systems that can be accessed by many different clients,for example,PDAs and mobile phones.These systems have to have a high level of security.Speed is also an issue,some database systems do well when there is not much information in them,but get much slower when their fields are full of data.So there is a strong trend to make database systems reply to queries fast.,2023/5/21,软件专业英语,7,三、替代练习,软件英语基础教程P21-22,2023/5/21,软件专业英语,8,四、句子翻译练习,Dont remind me.|别跟我说起了。Dont talk to me about that fellow.|别跟我谈起那个家伙。I wouldnt hear of it.|别跟我再说这事了。Dont be afraid，Ill help you.|别害怕，我会帮助你。Come off it,tell me the truth!|别胡扯了，把实话告诉我!Not at all.|别客气。Just dont do that,thats all.|别那么干，就是这样!Lets forget it.|别去想它了。Dont let that worry you.|别让那事折磨你了。Dont let me down.|别让我失望。,