Explanation:Not null constraint is specified which means sone value (can include 0 also) should be given. 8. The primary key must be
A. Unique
B. Not null
C. Both a and b
D. Either a or b
Answer:A
Explanation:Not null constraint is specified which means sone value (can include 0 also) should be given. 8. The primary key must be
A. Unique B. Not null C. Both a and b D. Either a or b
Explanation:Primary key must satisfy unique and not null condition for sure. 9. You attempt to query the database with this command: (25)