Suppose the user finds the usage of room number and phone number in a relational schema there is confusion.This is reduced by
A. Unique-role assumption
B. Unique-key assignment
C. Role intergral assignment
D. None of the mentioned
Answer:A
Suppose the user finds the usage of room number and phone number in a relational schema there is confusion.This is reduced by
A. Unique-role assumption B. Unique-key assignment C. Role intergral assignment D. None of the mentioned