Discussion
A candidate key must uniquely identify each row.
Answer: A
Correct answer: True
A candidate key is by definition a minimal set of attributes that uniquely identifies each row. A relation may have several, and the designer chooses one as the primary key on grounds of stability, simplicity and whether it can ever be null; the others remain candidate keys and are usually given unique indexes.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development