Explanation:Null is used to represent absence of a value. 3. The predicate in a where clause can involve Boolean operations such as and.The result of true and unknown is_______, false and unknown is _____, while unknown and unknown is _____.
A. Unknown, unknown, false
B. True, false, unknown
C. True, unknown, unknown
D. Unknown, false, unknown
Answer:A
Explanation:Null is used to represent absence of a value. 3. The predicate in a where clause can involve Boolean operations such as and.The result of true and unknown is_______, false and unknown is _____, while unknown and unknown is _____.
A. Unknown, unknown, false B. True, false, unknown C. True, unknown, unknown D. Unknown, false, unknown
Explanation:None. 4. Select name