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Chapter 2: Data Representation and Data Reduction

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DATABASESYSTEMSGROUPKnowledge Discovery in Databases I: data Representation1Knowledge Discovery in DatabasesSS 2016Lecture: Prof. Dr. Thomas SeidlTutorials: Julian Busch, Evgeniy Faerman,Florian Richter, Klaus SchmidLudwig-Maximilians-Universit t M nchenInstitut f r InformatikLehr-und Forschungseinheit f r DatenbanksystemeChapter 2: data RepresentationandData ReductionDATABASESYSTEMSGROUPOverview data Representation data types Comparisonandsimilarity data visualization data Reduction Aggregation GeneralizationKnowledge Discovery in Databases I: data Representation2DATABASESYSTEMSGROUPObjec ts carry information Objects and attributes Entity-Relationshipdiagram(ER) UML classdiagram data tables(relational model)Knowledge Discovery in Databases I: data , C,RBob1CSJava, PHPCharly4HistoryPiano,...Debra2ArtsPain ting, ...StudierendenamesemestermajorskillsStu dierendesemestermajorskillsnameDATABASES YSTEMSGROUPOverviewof (attribute) datatypes Simple datatypes Numerical, categorical, ordinal Composeddatatypes Sets, sequences, vectors Complexdatatypes Multimedia: images, videos, audio, text, documents, web pages, etc.

DATABASE SYSTEMS GROUP Overview • Data representation – Data types – Comparison and similarity – Data visualization • Data reduction – Aggregation

  Data, Representation, Similarity, Data representation

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