The entity integrity rule states that:
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Database · all questionsLogical Database Design
Logical Database Design
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When mapping a many-to-many unary relationship into a relation which of the following is true?
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If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?
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A foreign key is which of the following?
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A transitive dependency is which of the following?
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When mapping a multivalued attribute into a relation which of the following is true?
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If no multivalued attributes exist in a relation, then the relation is in what normal form?
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A primary key is which of the following?
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The relational model consists of:
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When mapping a binary many-to-many relationship into a relation which of the following is true?
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A relation has which of the following properties?
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When mapping a ternary relationship with an associative entity into a relation which of the following is true?
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When mapping a regular entity into a relation which of the following is true?
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When mapping a supertype/subtype relationship which of the following is true?
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Relations are:
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An enterprise key is a primary key whose value is unique for a given relation.
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A composite attribute does not get mapped into a relation.
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A relation is a two-dimensional table.
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Weak entities do not get mapped into a relation.
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A primary key may be null.
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