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1. |
What does the natural join operation do? |
A. | It considers only those pairs of tuples that have the same value on those attributes that appear in the schemas of both relations |
B. | It considers only those pairs of tuples that have the same value on at least one of the attributes that appear in the schemas of both the relations |
C. | It considers only those pairs of tuples that do not have the same value on those attributes that appear in the schemas of both relations |
D. | None of the mentioned |
Answer» B. It considers only those pairs of tuples that have the same value on at least one of the attributes that appear in the schemas of both the relations | |