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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 vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
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Functional Dependency Consider a relation R that has 2 attributes A and B. The attribute B of the relation is functionally dependent on the attribute A if and only if for every
Define the terms 1) physical schema 2) logical schema. Physical schema: The physical schema explains the database design at the physical level, which is the lowest level of abs
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
Structure of Client Server Systems: In client/server architecture, clients show users who require services while servers give services. Both client and server are a combination of
Explain ER Relationship model? An entity-relationship model (ERM): An entity-relationship model (ERM) is an abstract theoretical illustration of structured data. Entity-relatio
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What is a checkpoint? List the operations to be performed by the system when a checkpoint is to be taken. What does the recovery system do if there is a crash? There is large n
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