Database Systems MCQs – Practice Test 9 (Chapter 10)
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MCQ 41: Incase of a union operation r ∪ s to be valid, the number of conditions required, are:
MCQ 42: The select operation only selects those tuples that satisfies a specified:
MCQ 43: The join operation that takes tuples from the right relation that is not matching to any from the left relation, is known as:
MCQ 44: The positional notation of attributes are also applied over the:
MCQ 45: Select project, and rename operations are called unary operations, because they operate on:
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