[Relational.Theory.for.Computer.Professionals(2013.5)].C.J.Date.文字版

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1、RelationalTheoryforComputerProfessionalsWhatRelationalDatabasesAreReallyAllAboutC.J.DateRelationalTheoryforComputerProfessionalsbyC.J.DateCopyright©2013C.J.Date.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.1005GravensteinHighwayNorth,Sebastopol,CA95472O’Reill

2、ybooksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:(800)998-9938orcorporate@oreilly.com.PrintingHistory:May2013:FirstEdition.RevisionHi

3、story:2013-05-07FirstreleaseSeehttp://oreilly.com/catalog/errata.csp?isbn=0636920029649forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.RelationalTheoryforComputerProfessionalsandrelatedtradedressaretrademarksofO’ReillyMedia

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5、book,thepublisherandauthorassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcontainedherein.ISBN:978-1-449-36943-9[LSI]Mathematicalscienceshowswhatis.Itisthelanguageofunseenrelationsbetweenthings.—Ada,CountessofLovelace,quotedinDorothyStein(ed.):Ada:ALife

6、andaLegacy(1985)Thatistheessenceofscience:Askanimpertinentquestion,andyouareonthewaytoapertinentanswer.—JacobBronowski:TheAscentofMan(1973)Hofstadter’sLaw:Italwaystakeslongerthanyouexpect,evenwhenyoutakeintoaccountHofstadter’sLaw.—DouglasR.Hofstadter:Gödel,Escher,Bach:AnEternalGoldenBraid(1979)

7、———♦♦♦♦♦———TomywifeLindyandmydaughtersSarahandJenniewithallmyloveAbouttheAuthorC.J.Dateisanindependentauthor,lecturer,researcher,andconsultant,specializinginrelationaldatabasetechnology.HeisbestknownforhisbookAnIntroductiontoDatab