Explanation:Super key is the superset of all the keys in a relation. 2. Consider attributes ID , CITY and NAME . Which one of this can be considered as a super key ?
A. NAME
B. ID
C. CITY
D. CITY , ID
Answer:A
Explanation:Super key is the superset of all the keys in a relation. 2. Consider attributes ID , CITY and NAME . Which one of this can be considered as a super key ?
A. NAME B. ID C. CITY D. CITY , ID
Explanation:Here the id is the only attribute which can be taken as a key. Other attributes are not uniquely identified . 3. The subset of super key is a candidate key under what condition ?