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Define object-relational systems?
Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
what is un ordered and ordered file managment?
Object Oriented model :An object has values stored in instance variables within the object. An object also has bodies of code that execute on the object. These bodies of code are
What is Normalization? Database normalization is a data design and organization method applied to data structures based on rules that help building relational databases. In rel
differences between a classified catalog and a dictionary catalog
What is foreign key? Foreign Key - Let there are two relations in tables R and S. Any candidate key of the relation R that is referred in the relation S is known as the forei
What are the two methods for dealing deadlock problem? The two procedures for dealing deadlock problem is deadlock detection and deadlock recovery.
vertical fragmentation
Explain how the object classes are mapped to tables. Each object class maps to one or more than one tables in the database. The objects in the class may be partitioned horizont
why are older data models are being replaced by new data models
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