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Data Models into Database Designs

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

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

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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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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
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
An intrarelation constraint
A range constraint
A domain constraint

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

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

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Data Models into Database Designs
Which of the following column properties specifies whether or not cells in a column must contain a data value?

Data type
Data constraints
Default value
Null status

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