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Increases efficiency: Data is stored close to most often used site, therefore retrieval would be faster. Also, data that is not required by local applications is not stored, therefore the size of data to be looked into is smaller.
A set of possible data values is called? A set of possible data values is called as domain.
Differentiate sub-class and super-class? The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Convers
Define entity integrity and referential integrity. How does SQL allow specification of these? Ans: Entity Integrity Rule- If the attribute A of relation R is a prime attribut
#questiontypes of keys examples..
Why is need for the multiple access paths?
Design a gennalization and specialization hierarchy for an automobile sales company
What do you mean by persistence? How you will make your data persistent? Persistent data is the data, which has a longer lifetime than program which has created it. Enabling th
Question: (a) Use the following business rules to produce the E-R diagram. You should clearly show all the minimum and maximum cardinality constraint on each side of the relati
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Explain the cartesian product in Database Management System
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