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Data Models into Database Designs

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

True
False

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Data Models into Database Designs
All primary keys are required.

True
False

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Data Models into Database Designs
Which is not true about surrogate keys?

They are short.
They are fixed.
They have meaning to the user.
They are numeric.

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Data Models into Database Designs
Which of the following data constraints would be used to specify that the value of a cell in one column must be less than the value of a cell in another column in the same row of the same table?

An interrelation constraint
A range constraint
A domain constraint
An intrarelation constraint

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Data Models into Database Designs
For every relationship, there are six possible referential integrity actions.

False
True

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Data Models into Database Designs
A foreign key is used to implement relationships between tables.

True
False

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