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Syntaktische Datenmodelle im Vergleich

Syntaktische Datenmodelle im Vergleich


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About the Book

Studienarbeit aus dem Jahr 2007 im Fachbereich Informatik - Wirtschaftsinformatik, Note: 1,7, Leuphana Universität Lüneburg, Veranstaltung: Datenorganisation, Sprache: Deutsch, Abstract: Die theoretische Grundlage eines Datenbanksystems ist ein Datenbankmodell, welches die Realität vereinfacht, abstrahiert und ein korrektes Abbild der zugrunde liegenden Daten darstellt. Allgemein dienen Datenbanken der effizienten Organisation, Erzeugung, Manipulation und Verwaltung großer Datenmengen. Sie strukturieren die Daten mit Hilfe diverser Datenbankmodelle und stellen ihre Beziehungen zueinander dar. In der heutigen Zeit gibt es mehrere Ansätze für Datenmodelle, wie beispielsweise - das hierarchische Datenbankmodell (HDBM), - das Netzwerk-Datenbankmodell (NDBM), - das relationale Datenbankmodell (RDBM). Die Entwicklung vollzog sich in mehreren Schritten. Am Anfang, in den 50er Jahren, waren die wesentlichen Medien für Daten noch Papier und Magnetbänder. In den frühen 60er Jahren gab es bereits Magnetplatten (z.B. Festplatten und Disketten) und kurze Zeit später wurde die erste Datenbank, das hierarchische Datenbankmodell, entwickelt. In den 70er Jahren folgte das NDBM und fast zeitgleich, obwohl erst Ende der 70er Jahre umgesetzt, entstand die Idee des RDBM. Das HDBM und das NDBM sind heute kaum noch gebräuchlich und das RDBM stellt den Standard für Datenmodelle dar. Trotzdem haben alle der im Folgenden vorgestellten Modelle einen unterschiedlichen Aufbau und Stärken und Schwächen, die näher erläutert werden.


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Product Details
  • ISBN-13: 9783638911290
  • Publisher: Grin Verlag
  • Binding: Paperback
  • Language: German
  • Returnable: N
  • Spine Width: 4 mm
  • Weight: 145 gr
  • ISBN-10: 3638911292
  • Publisher Date: 19 Feb 2008
  • Height: 210 mm
  • No of Pages: 64
  • Series Title: German
  • Sub Title: Hierarchische, Netzwerk- und Relationale Datenbanksysteme
  • Width: 148 mm


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