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Data Models into Database Designs

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 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 domain constraint
A range constraint
An intrarelation constraint

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Data Models into Database Designs
Cascading updates refers to child rows being automatically deleted when a parent row is deleted.

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
For every relationship, how many possible sets of minimum cardinalities are there?

Two
Four
Six
Three

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Data Models into Database Designs
All primary keys are required.

False
True

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