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
Explanation:A desirable feature of a database design is the unique-role assumption, which means that each attribute name has a unique meaning in the database. 5. What is the best way to represent the attributes in a large database?