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ITEC 451 Assignment 4
Read Chapters 13, 14, and 16 and answer the following questions from the review sections:
Chapter 13
1) Define what is meant by entity integrity.
2) What is the difference between database structural integrity and semantic data
integrity?
3) What is the preferred method of implementing referential integrity in a relational
database?
4) What is a trigger and how can triggers be used to enhance integrity?
5) Name and describe four structural integrity problems that might be encountered by a
DBA.
Chapter 14
1) Explain two ways that views can be used to implement data security.
2) What is a cascading REVOKE and what effect can it have on database security?
3) What is the effect of granting a privilege to PUBLIC?
4) Why is it important to protect some database resources using security mechanisms
external to the DBMS?
5) Explain four useful ways of helping to prevent SQL injection attacks.
Chapter 16
1) What is the difference between a logical backup and an image copy backup?
2) Why can’t standby databases, replication, or disk mirroring be used to replace
traditional backup and recovery?
3) What factors determine whether a full or incremental image copy backup should be
taken for a database object?
4) Describe two ways to recover an index.
5) Name the different types of recovery and discuss the factors that influence when each
type of recovery should be performed.
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