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List the drawbacks of relational database system
A) Repetition of data
B) Inability to s certain information.
Improved availability: The data in a distributed system may be replicated so that it is at more than one site. Thus, the failure of a node or a communication link does not necessar
What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
Problem 1. Describe the following a) Advantages of Database Systems b) Functions of a DBMS Explanation of part (a) and (b) 2. Explain the following concepts w
does tables are called relations
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Explain Derived and Non-Derived Attribute? In few cases, two or more attribute values are related, for instance, Age and BirthDate attributes of a person. For specific person e
Explain Growing Phase of locking Growing Phase: In this phase the transaction can only obtain locks, but cannot release any lock. The transaction enters the growing phase as so
explain exhausitively the problems associated with er diagrams with ellustrations
Adding Redundant Associations for Efficient Access The expression redundant association means using "duplicate association for proficient access". While analysis, it is not a
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