什么是OLAP
2008-04-27 23:47
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On-LineAnalyticalProcessing(OLAP)isacategoryofsoftwaretechnologythatenablesanalysts,managersandexecutivestogaininsightintodatathroughfast,consistent,interactiveaccesstoawidevarietyofpossibleviewsofinformationthathasbeentransformedfromrawdatatoreflecttherealdimensionalityoftheenterpriseasunderstoodbytheuser.
OLAPfunctionalityischaracterizedbydynamicmulti-dimensionalanalysisofconsolidatedenterprisedatasupportingenduseranalyticalandnavigationalactivitiesincluding:calculationsandmodelingappliedacrossdimensions,throughhierarchiesand/oracrossmemberstrendanalysisoversequentialtimeperiodsslicingsubsetsforon-screenviewingdrill-downtodeeperlevelsofconsolidationreach-throughtounderlyingdetaildatarotationtonewdimensionalcomparisonsintheviewingarea
OLAPisimplementedinamulti-userclient/servermodeandoffersconsistentlyrapidresponsetoqueries,regardlessofdatabasesizeandcomplexity.OLAPhelpstheusersynthesizeenterpriseinformationthroughcomparative,personalizedviewing,aswellasthroughanalysisofhistoricalandprojecteddatainvarious"what-if"datamodelscenarios.ThisisachievedthroughuseofanOLAPServer.
OLAPSERVER
AnOLAPserverisahigh-capacity,multi-userdatamanipulationenginespecificallydesignedtosupportandoperateonmulti-dimensionaldatastructures.Amulti-dimensionalstructureisarrangedsothateverydataitemislocatedandaccessedbasedontheintersectionofthedimensionmemberswhichdefinethatitem.Thedesignoftheserverandthestructureofthedataareoptimizedforrapidad-hocinformationretrievalinanyorientation,aswellasforfast,flexiblecalculationandtransformationofrawdatabasedonformulaicrelationships.TheOLAPServermayeitherphysicallystagetheprocessedmulti-dimensionalinformationtodeliverconsistentandrapidresponsetimestoendusers,oritmaypopulateitsdatastructuresinreal-timefromrelationalorotherdatabases,orofferachoiceofboth.Giventhecurrentstateoftechnologyandtheenduserrequirementforconsistentandrapidresponsetimes,stagingthemulti-dimensionaldataintheOLAPServerisoftenthepreferredmethod.
OLAPGLOSSARYDefinedterms:AGGREGATEANALYSIS,MULTI-DIMENSIONALARRAY,MULTI-DIMENSIONALCALCULATEDMEMBERCELLCHILDRENCOLUMNDIMENSIONCONSOLIDATECUBEDENSEDERIVEDDATADERIVEDMEMBERSDETAILMEMBERDIMENSIONDRILLDOWN/UPFORMULAFORMULA,CROSS-DIMENSIONALGENERATION,HIERARCHICALHIERARCHICALRELATIONSHIPSHORIZONTALDIMENSIONHYPERCUBEINPUTMEMBERSLEVEL,HIERARCHICALMEMBER,DIMENSIONMEMBERCOMBINATIONMISSINGDATA,MISSINGVALUEMULTI-DIMENSIONALDATASTRUCTUREMULTI-DIMENSIONALQUERYLANGUAGENAVIGATIONNESTING(OFMULTI-DIMENSIONALCOLUMNSANDROWS)NON-MISSINGDATAOLAPCLIENTPAGEDIMENSIONPAGEDISPLAYPARENTPIVOTPRE-CALCULATED/PRE-CONSOLIDATEDDATAREACHTHROUGHROLL-UPROTATEROWDIMENSIONSCOPINGSELECTIONSLICESLICEANDDICESPARSEVERTICALDIMENSIONDefinitions:AGGREGATE共7页 第1页
OLAPfunctionalityischaracterizedbydynamicmulti-dimensionalanalysisofconsolidatedenterprisedatasupportingenduseranalyticalandnavigationalactivitiesincluding:calculationsandmodelingappliedacrossdimensions,throughhierarchiesand/oracrossmemberstrendanalysisoversequentialtimeperiodsslicingsubsetsforon-screenviewingdrill-downtodeeperlevelsofconsolidationreach-throughtounderlyingdetaildatarotationtonewdimensionalcomparisonsintheviewingarea
OLAPisimplementedinamulti-userclient/servermodeandoffersconsistentlyrapidresponsetoqueries,regardlessofdatabasesizeandcomplexity.OLAPhelpstheusersynthesizeenterpriseinformationthroughcomparative,personalizedviewing,aswellasthroughanalysisofhistoricalandprojecteddatainvarious"what-if"datamodelscenarios.ThisisachievedthroughuseofanOLAPServer.
OLAPSERVER
AnOLAPserverisahigh-capacity,multi-userdatamanipulationenginespecificallydesignedtosupportandoperateonmulti-dimensionaldatastructures.Amulti-dimensionalstructureisarrangedsothateverydataitemislocatedandaccessedbasedontheintersectionofthedimensionmemberswhichdefinethatitem.Thedesignoftheserverandthestructureofthedataareoptimizedforrapidad-hocinformationretrievalinanyorientation,aswellasforfast,flexiblecalculationandtransformationofrawdatabasedonformulaicrelationships.TheOLAPServermayeitherphysicallystagetheprocessedmulti-dimensionalinformationtodeliverconsistentandrapidresponsetimestoendusers,oritmaypopulateitsdatastructuresinreal-timefromrelationalorotherdatabases,orofferachoiceofboth.Giventhecurrentstateoftechnologyandtheenduserrequirementforconsistentandrapidresponsetimes,stagingthemulti-dimensionaldataintheOLAPServerisoftenthepreferredmethod.
OLAPGLOSSARYDefinedterms:AGGREGATEANALYSIS,MULTI-DIMENSIONALARRAY,MULTI-DIMENSIONALCALCULATEDMEMBERCELLCHILDRENCOLUMNDIMENSIONCONSOLIDATECUBEDENSEDERIVEDDATADERIVEDMEMBERSDETAILMEMBERDIMENSIONDRILLDOWN/UPFORMULAFORMULA,CROSS-DIMENSIONALGENERATION,HIERARCHICALHIERARCHICALRELATIONSHIPSHORIZONTALDIMENSIONHYPERCUBEINPUTMEMBERSLEVEL,HIERARCHICALMEMBER,DIMENSIONMEMBERCOMBINATIONMISSINGDATA,MISSINGVALUEMULTI-DIMENSIONALDATASTRUCTUREMULTI-DIMENSIONALQUERYLANGUAGENAVIGATIONNESTING(OFMULTI-DIMENSIONALCOLUMNSANDROWS)NON-MISSINGDATAOLAPCLIENTPAGEDIMENSIONPAGEDISPLAYPARENTPIVOTPRE-CALCULATED/PRE-CONSOLIDATEDDATAREACHTHROUGHROLL-UPROTATEROWDIMENSIONSCOPINGSELECTIONSLICESLICEANDDICESPARSEVERTICALDIMENSIONDefinitions:AGGREGATE共7页 第1页
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