A prime attribute of a relation scheme R is an attribute that appears
A. in all candidate keys of R.
B. in some candidate key of R.
C. in a foreign keys of R.
D. only in the primary key of R.
Answer:B
A prime attribute of a relation scheme R is an attribute that appears
A. in all candidate keys of R. B. in some candidate key of R. C. in a foreign keys of R. D. only in the primary key of R.