QUESTION:
“What is the difference between a key attribute and a non-key attribute”?
SOLUTION
A key attribute is an attribute that is part of a unique identifier. A non-key attribute is one that is not a constituent part of any unique identifier.
That is so great to hear. We really try our best to provide you the quality content. And thank you so much for taking the time to provide your feedback. Complaints
QUESTION: What is the primary key? How do the properties of a primary key differ from those of a candidate key?
QUESTION: What is the difference between a derived attribute and a stored attribute in terms of their representation in a relation schema?
QUESTION: “What is required to map a relationship type that exhibits a 1:n cardinality ratio?”
QUESTION: “What is a candidate key? How does a candidate key differ from a superkey?”
QUESTION: What is the difference between the referencing relation schema and the referenced relation schema? How are these terms incorporated into the foreign key design?
Question: What is the difference between logical and physical data independence? Why is the distinction between the two important?
QUESTION: Why does the relation create a result of a Projection operation on a relation that includes the primary key not contain fewer tuples than…
QUESTION: What is the difference between logical and physical data independence? Why is the distinction between the two important?
Question: “Discuss how to distinguish between an entity type and an attribute”?
QUESTION: “What would be the domain of the attribute County_name in the state of Texas”?
