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Explain Superkey
Ans: A superkey is described in the relational model of database organization like a set of attributes of a relation variable for which it holds that in all relations assigned to that variable there are no two different tuples (rows) that have similar values for the attributes in this set. Consistently a superkey can as well be defined as a set of attributes of a relvar upon that all attributes of the relvar are functionally dependent.
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
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There are two major types of fragmentation: Horizontal& Vertical. Horizontal fragments, as the name suggests are subsets of tuples and vertical fragments are subsets of attributes
explain at least five widly used case tools
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Explain the cartesian product in Database Management System
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About Attribute inheritance
Which component is not included in database environment ? A users component is not included in database environment.
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