Question 9: Identify all the foreign keys and the home relations in the following relation schemas,
using appropriate notation. Faculty (facld, firstname, lastname, rank, departmentname) Class
(ClassNumber, schedule, location, facld) Enroll (studid, ClassNumber, grade) 2 Student (studld,
firstname, lastname, credit) Question 10: What is the importance of foreign keys in a relational
model? Question 11: Which one of the following items is not an integrity constraint? (A) In a
relation, an attribute can take values only in the attribute domain. (B) In a relation, the specific
attribute that is selected as the primary key cannot have null values. (C) In a relation, duplicate
tuples should be distinguishable by foreign keys. (D) For an attribute to be a foreign key in a
relation, the attribute should be a primary key in a home relation..
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Question 9 Identify all the foreign keys and the home relat.pdf
1. Question 9: Identify all the foreign keys and the home relations in the following relation schemas,
using appropriate notation. Faculty (facld, firstname, lastname, rank, departmentname) Class
(ClassNumber, schedule, location, facld) Enroll (studid, ClassNumber, grade) 2 Student (studld,
firstname, lastname, credit) Question 10: What is the importance of foreign keys in a relational
model? Question 11: Which one of the following items is not an integrity constraint? (A) In a
relation, an attribute can take values only in the attribute domain. (B) In a relation, the specific
attribute that is selected as the primary key cannot have null values. (C) In a relation, duplicate
tuples should be distinguishable by foreign keys. (D) For an attribute to be a foreign key in a
relation, the attribute should be a primary key in a home relation.
