Database Normalization pptdata normalization ppt
Sectionobjectives Inthissectionyouwilllearn:Thepurposeofnormalization.Thepotentialproblemsassociatedwithredundantdatainbaserelations.Theconceptoffunctionaldependency,whichdescribestherelationshipbetweenattributes.Howtoundertaketheprocessofnormalization.Howtoidentify1NF,2NF,3NF.Theproblemsassociatedwithrelationsthatbreaktherules...
SoftwareSchoolofHunanUniversity 2006.08 DatabaseSystemsDesignPartIII Normalization DatabaseDesignFlowDiagram Individual Part1 Individual Part1 Intelligence Identify Summary Abstract Deduce,Refine Individual Partn Individual Partn ERmodelERmodel RelationsRelations Rational Relations Rational Relations Userview1Userview1...
SQL Server 2008 finds database in .BAK, but SQL Server 2008 R2 does not We received a .bak file as an export from an Act! database. My understanding is that this is a SQL Server backup that can be restored to SQL Server. When I try to restore it to SQL Server 2008 Express... ...
Chapter7:RelationalDatabaseDesignChapter7:RelationalDatabaseDesign FeaturesofGoodRelationalDesign 1NF(FirstNormalForm)第一范式 DecompositionUsingF..
The members were listed in the society’s membership directory of 2016 (N = 289). An information center for the German-speaking countries made a database available with information on the publications of authors and the scientific careers of the selected sample. This database and also ...
DATABASE DESIGN and NORMALIZATION ppt
YDatabase-KeyID-XTable-AID-YID-ZDatabase-Key BusinessObjectsDominate •MostAppsUseIndependentBusinessObjects –EachObjectHasaUniqueKey –TheRelationalVersionHastheKeyasaFieldfor –TheObjectIsSuckedintoMemoryasaWhole –UpdatesMadeinMemory;ChangedRecordsWrittenBack •JoinsAreUsedtoOvercomeNormalization –WeHave...
inanylegalrelationr(R),forallpairsof tuplest1andt2inrsuchthatt1[α]=t2[α],thereexist tuplest3andt4inrsuchthat t1[α]=t2[α]=t3[α]=t4[α] t3[β]=t1[β] t3[R−β]=t2[R−β] t4[β]=t2[β] t4[R−β]=t1[R−β][1] MultivaluedDependencyin4N Atablewithamultivalued...
YDatabase-KeyID-XTable-AID-YID-ZDatabase-KeyBusinessObjectsDominate•MostAppsUseIndependentBusinessObjects–EachObjectHasaUniqueKey–TheRelationalVersionHastheKeyasaFieldfor–TheObjectIsSuckedintoMemoryasaWhole–UpdatesMadeinMemory;ChangedRecordsWrittenBack•JoinsAreUsedtoOvercomeNormalization–WeHavetoPutthe...