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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 column properties specifies whether or not cells in a column must contain a data value?

Data constraints
Default value
Data type
Null status

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Data Models into Database Designs
In a 1:N relationship, the foreign key is placed in:

either table without specifying parent and child tables.
the child table.
the parent table.
either the parent table or the child table.

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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
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.

False
True

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