Explanation:An assertion is a predicate expressing a condition we wish the database to always satisfy. 8. Which of the following is the right syntax for assertion?
A. Create assertion ‘assertion-name’ check ‘predicate’;
B. Create assertion check ‘predicate’ ‘assertion-name’;
C. Create assertions ‘predicates’;
D. All of the mentioned
Answer:A
Explanation:An assertion is a predicate expressing a condition we wish the database to always satisfy. 8. Which of the following is the right syntax for assertion?
A. Create assertion ‘assertion-name’ check ‘predicate’; B. Create assertion check ‘predicate’ ‘assertion-name’; C. Create assertions ‘predicates’; D. All of the mentioned
Explanation:None. 9. Data integrity constraints are used to: