Principles of Information Systems, Loose-Leaf Version
13th Edition
ISBN: 9781305971820
Author: Ralph Stair, George Reynolds
Publisher: Course Technology
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Expert Solution & Answer
Chapter 5, Problem 1SAT
Program Description Answer
A key which is used to identify the field or set in a
Hence, the answer is option “D”.
Expert Solution & Answer
Explanation of Solution
Primary key:
- To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.
- Primary key is used to identify the unique record from a collection of records.
- To relate two tables, a primary key field in one table is added to the related table, and it is called as a foreign key.
Explanation for incorrect options:
Attribute:
- It is a property of an entity.
- It has the information about the entity and this information is captured within the attribute.
- For example, “name”, “address”, and “contact_number” are used to define the attribute about the customer.
Hence, the option “A” is wrong.
Data item:
- Data item describes the particular object of the table.
- The collection of data item in the same object may consider as row in a table.
Hence, the option “B” is wrong.
Record:
- Record is an element which is present in the database.
- The row of the table also known as record.
Hence, the option “C” is wrong.
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Chapter 5 Solutions
Principles of Information Systems, Loose-Leaf Version
Ch. 5.1 - Prob. 1RQCh. 5.1 - Which attribute would you designate as the primary...Ch. 5.1 - Prob. 1CTQCh. 5.1 - Prob. 2CTQCh. 5.2 - Prob. 1RQCh. 5.2 - Prob. 2RQCh. 5.2 - Prob. 1CTQCh. 5.2 - Prob. 2CTQCh. 5.3 - Prob. 1RQCh. 5.3 - Prob. 2RQ
Ch. 5.3 - What additional questions need to be answered...Ch. 5.3 - Prob. 2CTQCh. 5.4 - Prob. 1RQCh. 5.4 - Telefonica Brasil is one of the largest...Ch. 5.4 - Prob. 1CTQCh. 5.4 - Prob. 2CTQCh. 5.5 - Prob. 1RQCh. 5.5 - Prob. 2RQCh. 5.5 - Why is it unlikely that a traditional SQL database...Ch. 5.5 - Prob. 2CTQCh. 5 - Prob. 1SATCh. 5 - Prob. 2SATCh. 5 - Prob. 3SATCh. 5 - The ______________ model is a simple but highly...Ch. 5 - The ability to combine two or more tables through...Ch. 5 - Prob. 6SATCh. 5 - Prob. 7SATCh. 5 - Prob. 8SATCh. 5 - Prob. 9SATCh. 5 - Prob. 10SATCh. 5 - Prob. 11SATCh. 5 - Prob. 12SATCh. 5 - Prob. 13SATCh. 5 - Prob. 14SATCh. 5 - Prob. 15SATCh. 5 - Prob. 16SATCh. 5 - Prob. 1RQCh. 5 - In the hierarchy of data, what is the difference...Ch. 5 - Prob. 3RQCh. 5 - What is meant by data archiving? Why is this an...Ch. 5 - What is an entity-relationship diagram, and what...Ch. 5 - Identify four basic data manipulations performed...Ch. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 10RQCh. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Prob. 16RQCh. 5 - Prob. 17RQCh. 5 - Prob. 1DQCh. 5 - Outline some specific steps an organization might...Ch. 5 - SQL databases conform to ACID properties. Briefly...Ch. 5 - Prob. 4DQCh. 5 - Prob. 6DQCh. 5 - Prob. 8DQCh. 5 - Prob. 1PSECh. 5 - Describe the role of a database administrator....Ch. 5 - Prob. 2CECh. 5 - Prob. 1CTQ1Ch. 5 - Prob. 2CTQ1Ch. 5 - Prob. 3CTQ1Ch. 5 - Prob. 1CTQ2Ch. 5 - Prob. 2CTQ2Ch. 5 - Prob. 3CTQ2
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