VB流动资金贷款业务系统(论文和程序)
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VB流动资金贷款业务系统(论文和程序)-包括论文和程序列表 |
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VB流动资金贷款业务系统(论文和程序) - 3 文件数, 3 目录数.
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vb可用 - 11 文件数, 2 目录数.
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..\扉页(doc)396.doc
..\流动资金贷款业务系统开题报告(doc)397.doc
..\论文(doc)398.doc
..\流动资金贷款业务管理系统开题报告(doc)400.doc
..\答辩幻灯片.ppt
..\附录2英文文献翻译(doc)399.doc
VB流动资金贷款业务系统(论文和程序)-论文部分内容 |
附录2英文文献翻译(doc)399-部分内容英文原文2:
DATABASESYSYTEMS
12-1DATABASEMANAGEMENTSYSTEMS
Youknowthatadatabaseisacollectionoflogicallyrelateddataelementsthatmaybestructuredinvariouswaystomeetthemultipleprocessingandretrievalneedsoforganizationsandindividuals.There'snothingnewaboutdatabases-earlyoneswerechiseledinstone,pennedonscrolls,andwrittenonindexcards.Butnowdatabasesarecommonlyrecordedonmagnetizeablemedia,andcomputerprogramsarerequiredtoperformthenecessarystorageandretrievaloperations.
You'llseeinthefollowingpagesthatcomplexdatarelationshipsandlinkagesmaybefoundinallbutthesimplestdatabases.Thesystemsoftwarepackagethathandlesthedifficulttasksassociatedwithcreating,accessing,andmaintainingdatabaserecordsiscalledadatabasemanagementsystem(DBMS).TheprogramsinaDBMSpackageestablishaninterfacebetweenthedatabaseitselfandtheusersofthedatabase.(Theseusersmaybeapplicationsprogrammers,managersandotherswithinformationneeds,andvariousOSprogram.)
ADBMScanorganize,process,andpresentselecteddataelementsfromthedatabase.Thiscapabilityenablesdecisionmakerstosearch,probe,andquerydatabasecontentsinordertoextractanswerstononrecurringandunplannedquestionsthataren'tavailableinregularreports.Thesequestionsmightinitiallybevagueand/orpoorlydefined,butpeoplecan"browse"throughthedatabaseuntiltheyhavetheneededinformation.Inshort,theDBMSwill"manage"thestoreddataitemsandassembletheneededitemsfromthecommondatabaseinresponsetothequeriesofthosewhoaren'tprogrammers.Inafile-orientedsystem,usersneedingspecialinformationmaycommunicatetheirneedstoaprogrammer,who,whentimepermits,willwriteoneormoreprogramstoextractthedataandpreparetheinformation.TheavailabilityofaDBMS,however,offersusersamuchfasteralternativecommunicationspath
12-2DBMSSTRUCTURINGTECHNIQUES
Sequential,direct,andotherfileprocessingapproachesareusedtoorganizeandstructuredatainsinglefiles.ButaDBMSisabletointegratedataelementsfromseveralfilestoanswerspecificuserinquiriesforinformation.ThismeansthattheDBMSisabletoaccessandretrievedatafromnrecordfields.Thatis,theDBMSisabletostructureandt