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Relational Database Models Chapter 3
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Relational Database Models Chapter 3

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Questions and Answers

Any nonkey attributes that are associated with the M:N relationship are included with the relation ______.

C

When mapping binary one-to-one relationships, a foreign key is included in the relation on the ______ side of the relationship.

optional

When mapping associative entities, a third relation is created for the ______ entity.

associative

The default primary key of the associative relation consists of the ______ key that combines the two primary key attributes from the other two relations.

<p>composite</p> Signup and view all the answers

In some cases, additional attributes are required to form a unique ______ in a ternary relationship.

<p>PK</p> Signup and view all the answers

In Step 3 of database design, binary one-to-one relationships are mapped by creating ______ relations.

<p>two</p> Signup and view all the answers

When mapping ternary relationships, a new ______ relation is created.

<p>associative</p> Signup and view all the answers

The primary key of the associative relation in a ternary relationship consists of the ______ primary key attributes from the participating entity types.

<p>three</p> Signup and view all the answers

In Step 4 of database design, associative entities with assigned identifiers are mapped by creating ______ relations.

<p>three</p> Signup and view all the answers

In a relational database, the primary key of a relation is used as a foreign key in another relation to establish a ______ relationship.

<p>M:N</p> Signup and view all the answers

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