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Suppose that field 1 is a foreign key in relation A referencing relation B . Which of the following must be true? field 1 is
Suppose that field is a foreign key in relation A referencing relation B Which of the following must be true?
field is present only in relation
All values that appear in field in B must appear in field in A
field is present only in relation
All values that appear in field in A must appear in field in B
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