Curioustab
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Home
»
Database
»
Logical Database Design
The entity integrity rule states that:
no primary key attribute may be null.
no primary key can be composite.
no primary key may be unique.
no primary key may be equal to a value in a foreign key.
Correct Answer:
no primary key attribute may be null.
← Previous Question
Next Question→
More Questions from
Logical Database Design
The relational model consists of:
If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?
A transitive dependency is which of the following?
When mapping a regular entity into a relation which of the following is true?
When mapping a ternary relationship with an associative entity into a relation which of the following is true?
When mapping a supertype/subtype relationship which of the following is true?
When mapping a multivalued attribute into a relation which of the following is true?
Weak entities do not get mapped into a relation.
In a 1:M relationship, the primary key on the one side migrates to the many side to become the foreign key on the many side.
A primary key may be null.
Discussion & Comments
No comments yet. Be the first to comment!
Name:
Comment:
Post Comment
Join Discussion
Discussion & Comments