Database Systems MCQs – Practice Test 39 (Chapter 15)
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MCQ 191: We can drop attributes from a relation by the command:
MCQ 192: The effect of null values on some of the more complicated SQL constructs can be:
MCQ 193: The output to the comparison '1 < null', would be:
MCQ 194: The where clause is a predicate involving attributes of the relation in the:
MCQ 195: SQL was developed by:
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