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Data Models into Database Designs

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

True
False

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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 surrogate key
any alternate key
the primary key
a foreign key

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Data Models into Database Designs
When the parent entity is required, a new child row can always be inserted.

False
True

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Data Models into Database Designs
For every relationship, there are six possible sets of minimum cardinalities.

False
True

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Data Models into Database Designs
(STREET ADDRESS, CITY, STATE, ZIP) is an ideal primary key.

False
True

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Data Models into Database Designs
A primary key should be defined as:

NULL.
None of these
Either of the above can be used.
NOT NULL.

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