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ID:81922765
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页数:9页
时间:2022-10-14
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1、SQLserverdatabasemanagementandmaintenanceToconnectSQLServerdatabaseFirstweintroducethebasicknowledgeofthedatabase,beregardedasthewarm—upexercisethatstudydatabaseweavedistancefront!1.warm—upexerciseNeedingfirstavowalisrelationdatabasethatdatabaseknowledgethatwehe
2、reintroduceallpoint。Theso-calledrelationdatabaseistomeandataasthattheformgather,passingtoestablishsimpleformanakindofdatabaseforofrelationtodefiningconstruction.Iignorethewatchathowsavingwayinphysicsinthedocumentindatabaseis,itcanseetomakeanalineforwithrow,withe
3、lectronicsformissimilarwiththerow。Inrelationdatabase,thelinewerecalledtherecord,buttherowtheniscalledwordsegment。Thisforminsideeachanallinformationsforisarecord,itincludingparticularcustomer,buteachrecordthenincludedthesametypewiththewordsegmentofthequantity:Cus
4、tomer’snumber,nameetc。Formislogicsetthatakindofrelatedinformationthatpressalineofarrangingwithrow,similarinsingleforminwork.Eachrowofthewordadatabaseforminsidecallsawordsegment.Watchisfromeverykindofwordadefinitionofitscontainmentof,eachwordadatafordescribingits
5、implying。Whilecreatingtosetupadatabase,thebeardassignforeachwordsegmentathepiecebelongstothesexwiththeotheraccordingtothetype,biggestlength。Thewordsegmentcanincludeeverykindofwordsign,arithmeticfigureevensketch.Aninformationofrelevantcustomerdepositsinthelineoft
6、heform,iscalledrecord。Byanylarge,arbitrarilytworecordsfordatabaseformtocreatesetupcan’tbesame.Keybeacertainwordsegment(orseveralwordssegment)oftheforminside,it()forfastinspectbutdriveindex。Thekeycanbeunique,andalsocanthentherightandwrongisunique,beingdecidedbyit
7、()whetheradmissionrepetition.Uniquekeycanspecifyformainkey,usingeachonethatcometouniquemarkingform。Thenormturnsthedatabasedesignofmissionbemethodthatthedataofbuildup,butthedataofbuildup,shouldcandissolveotioserepetition,andforhavethenecessaryinformationofferingt
8、ochecktoseekthepathquickly。Forattainingthiskindoftargetbutseparateinformationtotheprocessgonetoineverykindofindependentform,becalledthenormturn.Itiscomplicatedprocess
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