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Data Models into Database Designs

Data Models into Database Designs
A unique, DBMS-supplied identifier used as the primary key of a relation is called a(n):

surrogate key.
primary key.
foreign key.
composite key.

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Data Models into Database Designs
If a relationship has a cascade updates constraint, then if ________ in the parent table is changed, then the same change will automatically be made to any corresponding foreign key value.

a foreign key
a surrogate key
any alternate key
the primary key

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Data Models into Database Designs
The DBMS allows surrogate keys to be changed.

False
True

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Data Models into Database Designs
Intersection tables are ID-dependent on both their parent tables.

False
True

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Data Models into Database Designs
An ideal primary key is short, numeric and seldom changing.

False
True

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Data Models into Database Designs
A foreign key is:

All of these
used to define null status.
a column containing the primary key of another table.
used to define data types.

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