What is the process in which there is redundancy of data to improve performance?
A.
Redundancy
B.
Normalization
C.
Denormalization
D.
Granularity
E.
Cardinality
Explanation:
Denormalization is the process of intentionally backing away from normalization to
improve performance by suppressing join and permitting the use of star transformation technique.
Denormalization should not be the first choice for improving performance and should only be used
for fine tuning of a database for a particular application.
C
norm
1) each attribute can only have one single value
2) partial dependency is not allowed
3) dependency between two non-primary attribute is not allowed
LOOKS OLAP only conforms 1)
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