《讲数据库软件》PPT课件.ppt

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1、第四讲数据库软件（DatabaseSoftware）泸州职业技术学院信息工程系8/27/20211软件专业英语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8/27/20212软件专业英语一、解释术语术语含义术语含义DatabaseSoftware数据库软件Field字段FlatFileDatabase平面文件数据库RelationalDatabase

2、关系数据库SQL结构化查询语言DBMS数据库管理系统DatabaseCustomization数据库定制DatabaseSecurity数据库安全8/27/20213软件专业英语二、讲解课文第一段：数据库软件概述Databasesoftwarestoresandrecallsinformationinfieldsinasystematicandorganizedway.Itislikeputtingmanyboxesoffilesinapartmentsinanapartmentbuilding,eachonehasaspecificaddres

3、s.Whenyouwanttogobacklaterandretrievetheinformation,youjustneedtoremembertheaddressfortheapartmentyouputitin.Themainkindsarerelationalandflatfile.Thebasicdifferenceisthatrelationaldatabasesallowmorecomplicatedlinkinganddisplayofdata.Theyhaveamasterfilewhereinformationisentere

4、d,ifthedatainthemasterfilechangesitisupdatedthroughoutthewholedatabasesystemautomatically.Inflatfiledatabase,linkinganddisplayofinformationinfieldscanonlybedonebyspecialprogramming.8/27/20214软件专业英语二、讲解课文第二段：数据库软件市场如何盈利Moneyismadeonthesaleorrentalofdatabasesoftwarelicenses,and

5、onthedevelopmentandcustomizationofdatabasesforuseinspecificbusinesses.Formanybusinesses,theirdatabaseistheheartoftheiroperation.Forexample,ininsuranceandbanking,thenumbersandnamesintheirdatabasearetheirbusiness.Withoutthese,theyhavenobusiness.Thecurrentstateoftheindustryistha

6、tdatabasesoftwareisusuallyhostedonaserveronacorporatenetworkortheInternet.Informationisrequestedorqueriedbyclientstotheserver,andsentbackfordisplayonthelocalmonitororscreen.Insystemslikethis,SQL(StructuredQueryLanguage)statementsareusuallysenttoaDBMS(DatabaseManagementSystem)

7、applicationthatthenretrievestheinformationandsendsitbacktowhatevermadetherequest.8/27/20215软件专业英语二、讲解课文第三段：数据库软件的发展趋势RecenttrendsintheindustryincludethemovementtodatabasesthatcanbeaccessedovertheInternet,anddatabasesystemsthatcanbeaccessedbymanydifferentclients,forexample,PDA

8、sandmobilephones.Thesesystemshavetohaveahighlevelofsecurity.Speedisa