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Data Models into Database Designs

Data Models into Database Designs
Each entity is represented as a(n):

table.
attribute.
tuple.
file.

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Data Models into Database Designs
Surrogate keys have much meaning for users.

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
a foreign key
any alternate key
the primary key

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Data Models into Database Designs
When the parent entity is required, cascading updates and cascading deletions should be allowed or the associated actions on the parent should be prohibited.

True
False

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Data Models into Database Designs
Which of the following columns is(are) are required in a table?

A foreign key
A primary key
A surrogate key
An alternate key

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

True
False

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