DATABASE SYSTEMS (LOOSELEAF)-W/MINDTAP
DATABASE SYSTEMS (LOOSELEAF)-W/MINDTAP
13th Edition
ISBN: 9781337761833
Author: Coronel
Publisher: CENGAGE L
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Chapter 3, Problem 1P
Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

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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Chapter 3 Solutions

DATABASE SYSTEMS (LOOSELEAF)-W/MINDTAP

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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