Explanation:Unknown values do not take null value but it is not known. 6. The ____ connective tests for set membership, where the set is a collection of values produced by a select clause. The ____ connective tests for the absence of set membership.
A. Or, in
B. Not in, in
C. In, not in
D. In, or
Answer:A
Explanation:Unknown values do not take null value but it is not known. 6. The ____ connective tests for set membership, where the set is a collection of values produced by a select clause. The ____ connective tests for the absence of set membership.
A. Or, in B. Not in, in C. In, not in D. In, or
Explanation:In checks if the query has the value but not in checks if it does not have the value. 7. Which of the following should be used to find all the courses taught in the Fall 2009 semester but not in the Spring 2010 semester .