Question

Ansi-standard sql allows the use of special operators in conjunction with the where clause. A special operator used to check whether an attribute value is null is

Answer 1

Answer:

The question is incomplete, the correct question should be :

ANSI-standard SQL allows the use of special operators in conjunction with the WHERE clause. A special operator used to check whether an attribute value is null is

a) BETWEEN

b) IS NULL

c) LIKE

d) IN

Answer: Is Null

Here exists is used to see if an attribute value is null or not