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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 parent table.
the child table.
either the parent table or the child table.
Correct Answer:
the child table.
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Data Models into Database Designs
The DBMS allows surrogate keys to be changed.
For every relationship, there are six possible referential integrity actions.
In 1:N relationships, which entity becomes the parent entity is arbitrary.
A foreign key is used to implement relationships between tables.
All primary keys are required.
When the parent entity is required, a new parent row can always be inserted.
When the parent entity is required, cascading updates and cascading deletions should be allowed or the associated actions on the parent should be prohibited.
An intersection table is required to represent M:N relationships.
In a 1:1 relationship, the primary key placement is arbitrary.
For every relationship, there are six possible sets of minimum cardinalities.
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