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Which database object does not physically exist?
A view database object does not physically exist.
About Attribute inheritance
What are the problems if one were not to normalize? When do these problems surface? Ans: Database normalization, sometimes considered to as canonical synthesis, is
SET concept is used in which type of modelling? SET concept is used in Network Model.
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
WOUND-WAIT
The result of the UNION operation between R1 and R2 is a relation that includes? The result of the operation between R1 and R2 includes all the tuples of R1 and R2 which have c
Describes the several relationship constraints through giving suitable example? Constraints on relationships: There are two kinds of constraints on relationships. 1) Mapping
What Command You Use What Day of the week were you born
Although, the essential features of E-R diagrams are enough to design many database situations. Though, with more difficult relations and advanced database applications, it is need
waht is a repeating group?
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