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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?

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

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Data Models into Database Designs
In a 1:1 relationship, the primary key placement is arbitrary.

False
True

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Data Models into Database Designs
Which of the following situation requires the use of ID-dependent entities?

Multivalued attributes only
Archetype/instance relationships only
Association relationships only
All of these

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Data Models into Database Designs
The identifier of an entity will become the ________ of the new table.

identity key
main attribute
primary key
foreign key

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Data Models into Database Designs
For every relationship, how many possible sets of minimum cardinalities are there?

Four
Six
Three
Two

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