데이터 베이스정보처리산업기사 · 2010년03월07일 · 1/100
1.A is a relation with cardinality 3 and degree 5 and B is relation with cardinality 4 and degree 2. When we combine relation A and B by the cartesian product, what relation does come out?
1
cardinality 4 and degree 2
2
cardinality 3 and degree 5
3
cardinality 7 and degree 10
4
cardinality 12 and degree 7정답
해설
Cardinality는 곱하고 Degree는 더한다..