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Optimierung Von Nested Queries Unter Verwendung Der Nf2-Algebra by Jürgen Hölsch

Optimierung Von Nested Queries Unter Verwendung Der Nf2-Algebra

by Jürgen Hölsch
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Book cover type: Paperback
  • ISBN13: 9783658126094
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Springer Vieweg
  • Publisher Imprint: Springer Vieweg
  • Publication Date:
  • Pages: 83
  • Original Price: EUR 46.72
  • Language: German
  • Edition: 1. Aufl. 2016
  • Item Weight: 137 grams
  • BISAC Subject(s): Internet / General

Jürgen Hölsch erarbeitet einen neuen Ansatz zur Optimierung von verschachtelten SQL-Anfragen (Nested Queries), einem wichtigen Teilgebiet der Datenbankforschung. Es gelingt ihm, diese Anfragen im gleichen Schritt wie alle übrigen Optimierungen zu behandeln. Dazu werden SQL-Anfragen mithilfe der Non-First Normal Form (NF2)-Algebra dargestellt, die ursprünglich dazu entwickelt wurde, Anfragen auf verschachtelten Tabellen zu beschreiben. Da diese Algebra im Gegensatz zur relationalen Algebra den heutigen Stand von SQL nahezu 1:1 abbilden kann, können bekannte und auch neue Optimierungstechniken für verschachtelte Anfragen formalisiert werden. Die Anwendbarkeit wird anhand der praktischen Umsetzung des Ansatzes in einem Anfrageoptimierer und den daraus resultierenden Performance-Gewinnen demonstriert.

Jürgen Hölsch erhielt 2015 den Master of Science im internationalen Studiengang Computer and Information Science an der Universität Konstanz, bei der er aktuell als Doktorand tätig ist. Seine Forschung befasst sich mit der Anfrageoptimierung in Graph-Datenbanken.

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