Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 3, Problem 2P
Program Plan Intro

Entity Integrity:

Entity Integrity is a mechanism that is used to protect primary keys in the database. Entity Integrity ensures the following properties for primary key:

  • The primary key of one database table row must not match the primary key of any other row present in the table.
  • No component of primary key must be null.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE
1 Mr. Williamson John W 21-May-84 3
2 Ms. Ratula Nancy   09-Feb-89 2
3 Ms. Greenboro Lottie R 02-Oct-81 4
4 Mrs. Rumpersfro Jennie S 01-Jun-71 5
5 Mr. Smith Robert L 23-Nov-59 3
6 Mr. Renselear Cary A 25-Dec-85 1
7 Mr. Ogallo Roberto S 31-Jul-82 3
8 Ms. Johnson Elizabeth I 10-Sep-88 1
9 Mr. Eindsmar Jack W 19-Apr-55 2
10 Mrs. Jones Rose R 06-Mar-66 4
11 Mr. Broderick Tom   21-Oct-72 3
12 Mr. Washington Alan Y 08-Sept-74 2
13 Mr. Smith Peter N 25-Aug-64 3
14 Ms. Smith Sherry H 25-May-66 4
15 Mr. Olenko Howard U 24-May-64 5
16 Mr. Archialo Barry V 03-Sep-60 5
17 Ms. Grimaldo Jeanine K 12-Nov-70 4
18 Mr. Rosenburg Andrew D 24-Jan-71 4
19 Mr. Rosten Peter F 03-Oct-68 4
20 Mr. Mckee Robert S 06-Mar-70 1
21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE
1 Access Junction 1003455.76 2 8
2 Database Corner 1421987.39 2 12
3 Tuple Charge 986783.22 1 7
4 Attribute Alley 944568.56 2 3
5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT
1 EAST
2 WEST

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Students have asked these similar questions
Write foreign key constraints for the relationships in each of these tables. Make your own assumptions regarding cascading updates and deletions and justify those assumptions. (Hint: You can combine the SQL for your answers to parts A and B.)
Define the term referential integrity constraint. Give an example of a referential integrity constraint for the tables you created for question 1.8.
Define second normal form. What types of problems would you find in tables that are not in second normal form?

Chapter 3 Solutions

Database Systems: Design, Implementation, & Management

Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Use Figure Q3.13 to answer Questions 1317. FIGURE...Ch. 3 - Create the table that results from applying a...Ch. 3 - Write the relational algebra formula to apply an...Ch. 3 - Create the table that results from applying an...Ch. 3 - Using the tables in Figure Q3.13, create the table...Ch. 3 - Prob. 18RQCh. 3 - Prob. 19RQCh. 3 - Prob. 20RQCh. 3 - Identify and describe the components of the table...Ch. 3 - Identify the primary keys. FIGURE Q3.22 THE...Ch. 3 - Identify the foreign keys. FIGURE Q3.22 THE...Ch. 3 - Create the ERM. FIGURE Q3.22 THE CH03_THEATER...Ch. 3 - Create the relational diagram to show the...Ch. 3 - Prob. 26RQCh. 3 - What would be the conceptual view of the INDEX...Ch. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Do the tables exhibit referential integrity?...Ch. 3 - Describe the type(s) of relationship(s) between...Ch. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Create the relational diagram to show the...Ch. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Create the relational diagram to show the...Ch. 3 - Prob. 13PCh. 3 - Do the tables exhibit referential integrity?...Ch. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - For each table, identify the primary key and the...Ch. 3 - Prob. 18PCh. 3 - Do the tables exhibit referential integrity?...Ch. 3 - Identify the TRUCK tables candidate key(s). FIGURE...Ch. 3 - For each table, identify a superkey and a...Ch. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Create the ERD. (Hint: Look at the table contents....Ch. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Create the table that would result from applying...Ch. 3 - Create the table that would result from applying...Ch. 3 - Create the table that would result from applying a...
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