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1、毕业论文（设计）外文翻译题目：新生入学管理系统学院：学生姓名：专业：班级：指导教师：起止日期：年月日DatabaseManagementDatabase(sometimesspelleddatabase)isalsocalledanelectronicdatabase,referringtoanycollectionsofdata,orinformation,thatisspeciallyorganizedforrapidsearchandretrievalbyacomputer.Databasesarestr
2、ucturedtofacilitatethestorage,retrievalmodificationanddeletionofdatainconjunctionwithvariousdata-processingoperations.Databasecanbestoredonmagneticdiskortape,opticaldisk,orsomeothersecondarystoragedevice.Adatabaseconsistsofafileorasetoffiles.Theinformationin
3、thethesefilesmaybebrokendownintorecords,eachofwhichconsistsofoneormorefieldsarethebasicunitsofdatastorage,andeachfieldtypicallycontainsinformationpertainingtooneaspectorattributeoftheentitydescribedbythedatabase.Usingkeywordsandvarioussortingcommands,usersca
4、nrapidlysearch,rearrange,group,andselectthefieldsinmanyrecordstoretrieveorcreatereportsonparticularaggregatesofdata.Databaserecordsandfilesmustbeorganizedtoallowretrievaloftheinformation.Earlysystemwerearrangedsequentially(i.e.,alphabetically,numerically,orc
5、hronologically);thedevelopmentofdirect-accessstoragedevicesmadepossiblerandomaccesstodataviaindexes.Queriesarethemainwayusersretrievedatabaseinformation.Typicallytheuserprovidesastringofcharacters,andthecomputersearchesthedatabaseforacorrespondingsequenceand
6、providesthesourcematerialsinwhichthosecharactersappear.Ausercanrequest,forexample,allrecordsinwhichthecontentofthefieldforaperson’slastnameisthewordSmith.Themanyusersofalargedatabasemustbeabletomanipulatetheinformationwithinitquicklyatanygiventime.Moreover,l
7、argebusinessandotherorganizationstendtobuildupmanyindependentfilescontainingrelatedandevenoverlappingdata,andtheirdata,processingactivitiesoftenrequirethelinkingofdatafromseveralfiles.Severaldifferenttypesofdatabasemanagementsystemshavebeendevelopedtosupport
8、theserequirements:flat,hierarchical,network,relational,andobject-oriented.Inflatdatabases,recordsareorganizedaccordingtoasimplelistofentities;manysimpledatabasesforpersonalcomputersareflatinstru
