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Unformatted text preview: a) One relation is created. b) Two relations are created c) Three relations are created. d) Four relations are created 6. When mapping a ternary relationship with an associative entity into a relation which of the following is true? a) One relation is created. b) Two relations are created c) Three relations are created d) Four relations are created 7. A candidate key must uniquely identify each row. a) True b) False 8. Weak entities do not get mapped into a relation. a)True b) False 9. A primary key may be null. a) True b) False 10 . A set of one or more attributes is? a) Primary key. b) Candidate key c) Super key d) Foreign key...
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- Spring '07
- primary key, relation