Relation C is a projection of relation A. Which of the following statements…
PYQ RPSC Programmer 2013
Relation C is a projection of relation A. Which of the following statements must be true in all cases where relation C is different from relation A?
- A.
The cardinality of C is greater than the cardinality of A
- B.
The cardinality of C is less than the cardinality of A
- C.
The arity of C is greater than the arity of A
- D.
The arity of C is less than the arity of A
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