Del i serien Lecture Notes in Computer Science
Nested Universal Relation Database Model
Häftad, Engelska, 1992
739 kr
Beställningsvara. Skickas inom 10-15 vardagar. Fri frakt för medlemmar vid köp för minst 249 kr.
This monograph describes a method of data modelling whosebasic aim is to make databases easier to use by providingthem with logical data independence. To achieve this, thenested UR (universal relation) model is defined by extendingthe classical UR model to nested relations. Nested relationsgeneralize flat relations and allow hierarchicallystructured objects to be modelled directly, whereas theclassical UR model allows the user to view the database asif it were composed of a single flat relation. The authorpresents a comprehensive formalisation of the nestedrelational model, which incorporated null values into themodel. Functional data dependencies and the classical notionof lossless decomposition are extended to nested relationsand an extended chase procedure is defined to test thesatisfaction of the data dependencies. The nested UR modelis defined, and the classical UR model is shown to be aspecial case of the nested model. This implies that an URinterface canbe implemented by using the nested UR model,thus gaining the full advantages of nested relations overflat relations.
Produktinformation
- Utgivningsdatum1992-05-20
- Mått155 x 235 x undefined mm
- Vikt300 g
- FormatHäftad
- SpråkEngelska
- SerieLecture Notes in Computer Science
- Antal sidor182
- Upplaga1992
- FörlagSpringer-Verlag Berlin and Heidelberg GmbH & Co. KG
- ISBN9783540554936
Tillhör följande kategorier
Hoppa över listan
Mer från samma serie
Del 16375
Agent Mediated Electronic Commerce II
Alexandros Moukas, Carles Sierra, Fredrik Ygge
Häftad, 2000
739 kr
Del 16376
Segmentation, Classification, and Synthesis for Brain Tumors and Traumatic Brain Injuries
Spyridon Bakas, Emily Dennis, Mehdi Astaraki, Ujjwal Baid, Gian Marco Conte, Martha Foltyn-Dumitru, Zhifan Jiang, Dominic Labella, Marie-Christin Metz, Udunna Anazodo, Maria Correia de Verdier, Florian Kofler, Hongwei Bran Li, Marius George Linguraru, Nazanin Maleki
Häftad, 2026
1 219 kr
Del 15401
Medical Image Computing and Computer Assisted Intervention – MICCAI 2024 Workshops
Anna Schroder, Xiang Li, Tanveer Syeda-Mahmood, Neil P. Oxtoby, Alexandra Young, Alessa Hering, Tejas S. Mathai, Pritam Mukherjee, Sven Kuckertz, Tiantian He, Isaac Llorente-Saguer, Andreas Maier, Satyananda Kashyap, Hayit Greenspan, Anant Madabhushi
Häftad, 2025
969 kr
Del 16625