The Nested Universal Relation Database Model by Mark Levene (English) Paperback
67,86 €
By Mark Levene. 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.
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