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It defines that the tuple in one relation that refers to another relation must refer to an existing tuple in that relation. This constraint is states on two relations (not essentia
What is indexed sequential file organization? What are the applications of this organization? Ans: An index file can be employed to effectively overcome the problem of storing
Modular growth: In distributed environments, it is simple to expand. Latest sites can be added to the network without affecting the operations of other sites, as they are somewhat
The Form input elements are: Reporter name text type input Password
#question benefits and limitations of data models..
What is a query tree? Ans: A query tree, as well known as operator graph, is a tree data structure that corresponds to a relational algebra expression. It denotes the inpu
What is candidate key? Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
Give the two reasons for allowing concurrency
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
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