š Question
#1060
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 _____
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Correct Answer
A. Unknown, unknown, false
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Explanation
None. 4. SELECT name FROM instructor WHERE salary IS NOT NULL; Selects a) Tuples with null value b) Tuples with no null values c) Tuples with any salary d) All of the mentioned Not null constraint removes the tpules of null values.
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