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How nulls are treated in comparison operator?
Along with comparison (relational) operators, the null values are ignored as we cannot derive the relation along with the given operand. Nulls cannot be equated. Nulls can be checked through containment by using IS NULL or IS NOT NULL operators.
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
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Design a gennalization and specialization hierarchy for an automobile sales company
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