Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
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Expert Solution & Answer
Chapter 5, Problem 5.3RQ
Explanation of Solution
Normalization:
In
Normalization is mainly used for two purposes. They are:
- Reduce or eliminate redundancy in the database table.
- Ensuring data dependencies.
Importance of Normalization process:
- The normalization process is important while creating a table in the database, because the process will eliminate the redundancy of data in the database table.
- The normalization process is then applied to each relation and the extra relations are created.
Example:
Consider the example of the above scenario is as follows:
number | name | age | sex | course |
1 | John | 23 | M | C1 |
2 |
Expert Solution & Answer
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Why is it necessary to apply the normalization process to the tables created according to your answer to question 5.1?
Explain why it is beneficial to first go through the normalization procedure and then denormalize.
The benefits of using tables in relational databases are many, so how about we go through some of them? Would you be willing to elaborate on the concept of NULL in a short essay?
Chapter 5 Solutions
Database Concepts (7th Edition)
Ch. 5 - Explain how entities are transformed into tables.Ch. 5 - Prob. 5.2RQCh. 5 - Prob. 5.3RQCh. 5 - What is denormalization?Ch. 5 - Prob. 5.5RQCh. 5 - Explain the problems that denormalized tables may...Ch. 5 - Explain how the representation of weak entities...Ch. 5 - Explain how supertype and subtype entities are...Ch. 5 - Prob. 5.9RQCh. 5 - Prob. 5.10RQ
Ch. 5 - Show two different ways to represent the 1:1...Ch. 5 - Prob. 5.12RQCh. 5 - Prob. 5.13RQCh. 5 - Prob. 5.14RQCh. 5 - Prob. 5.15RQCh. 5 - Prob. 5.16RQCh. 5 - For your answer to question 5.15, code an SQL...Ch. 5 - Prob. 5.18RQCh. 5 - Prob. 5.20RQCh. 5 - Prob. 5.21RQCh. 5 - Explain how the terms parent table and child table...Ch. 5 - For your answers to questions 5.20, 5.21, and...Ch. 5 - Prob. 5.24RQCh. 5 - Prob. 5.25RQCh. 5 - Prob. 5.26RQCh. 5 - Prob. 5.27RQCh. 5 - Prob. 5.28RQCh. 5 - Define the three types of recursive binary...Ch. 5 - Prob. 5.30RQCh. 5 - Prob. 5.31RQCh. 5 - Prob. 5.32RQCh. 5 - Prob. 5.33RQCh. 5 - Prob. 5.34RQCh. 5 - Code an SQL statement that creates a table with...
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- Explain the process of decomposition in normalization. How do you decompose a table into multiple tables while preserving data integrity?arrow_forwardWhat is the purpose of normalization?arrow_forwardSelect operations in relational databases are used to reduce the number of columns in a table based on predefined conditions.Where do you stand on this?arrow_forward
- Normalize the following unnormalized table using the three normalization rules and describe each step. Unnormalized table:arrow_forwardNormalize this table in database to at least 3NFarrow_forwardThe one-to-many relationship between two tables is made by including the primary key from one table into the other, thus making it a: (SELECT ONLY ONE ANSWER) A)Compound key B) Foreign key C) Important key D)Primary keyarrow_forward
- Selected columns are removed from a table using a relational database's "select" method.It's possible that I'm mistaken.arrow_forwardUsing the SQL programming language, how would one go about changing the structure of an existing table? Which of these more significant types of shifts could be open to discussion as an option? Which commands need to be executed in order for these modifications to take effect?arrow_forwardHow about we make a list of why utilizing tables in databases is useful? what is your take on NULL in a few words?arrow_forward
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