Reference no: EM133094860
1. What is a referential integrity constraint? Define the term, and give an example of its use. Are null values allowed in foreign key columns with a referential integrity constraint? How does the referential integrity constraint contribute to database integrity?
2. Explain the role of referential integrity constraints in normalization.
3. Do relations StudID_SocialSecurityNumber and SocialSecurityNumber_StudName contain a transitive dependency?
4. In normalization example 3, why is the EXTENDED_PRICE relation "silly"?
5. In normalization example 4, under what conditions is the functional dependency (StudentID, Activity) S ActivityFee more accurate than Activity S ActivityFee
6. If a determinant is part of a candidate key, is that good enough for BCNF?
7. In normalization example 5, why are the following two tables not correct? DEPARTMENT (Department, DeptBudgetCode, Buyer) SKU_DATA_4 (SKU, SKU_Description, Department)
8. How does a multivalued dependency differ from a functional dependency?
9. Consider the relation: PERSON (Name, Sibling, ShoeSize) Assume that the following functional dependencies exist: Name S S Sibling Name S ShoeSize Describe deletion, modification, and insertion anomalies for this relation.
10. Why is BCNF referred to as the best of the forms?
11. Consider the relation: PERSON_2 (Name, Sibling, ShoeSize, Hobby) Assume that the following functional dependencies exist: Name S S Sibling Name S ShoeSize Name S S Hobby Describe deletion, modification, and insertion anomalies for this relation.
12. What must we know in order to find functional dependencies in a table?
13. What is a multivalued dependency?
14. How do the conditions for DK/NF correspond to the conditions for BCNF.
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