Book Image

Learn SQL Database Programming

By : Josephine Bush
5 (1)
Book Image

Learn SQL Database Programming

5 (1)
By: Josephine Bush

Overview of this book

SQL is a powerful querying language that's used to store, manipulate, and retrieve data, and it is one of the most popular languages used by developers to query and analyze data efficiently. If you're looking for a comprehensive introduction to SQL, Learn SQL Database Programming will help you to get up to speed with using SQL to streamline your work in no time. Starting with an overview of relational database management systems, this book will show you how to set up and use MySQL Workbench and design a database using practical examples. You'll also discover how to query and manipulate data with SQL programming using MySQL Workbench. As you advance, you’ll create a database, query single and multiple tables, and modify data using SQL querying. This SQL book covers advanced SQL techniques, including aggregate functions, flow control statements, error handling, and subqueries, and helps you process your data to present your findings. Finally, you’ll implement best practices for writing SQL and designing indexes and tables. By the end of this SQL programming book, you’ll have gained the confidence to use SQL queries to retrieve and manipulate data.
Table of Contents (24 chapters)
1
Section 1: Database Fundamentals
7
Section 2: Basic SQL Querying
11
Section 3: Advanced SQL Querying
16
Section 4: Presenting Your Findings
19
Section 5: SQL Best Practices

Database normalization

Database normalization is the process of putting your raw data into tables using rules to avoid redundant data, optimize database performance, and ensure data integrity.

Without proper normalization, not only can you have data redundancy, which uses additional storage space, but it can be more difficult to update and maintain the database without data loss.

Normalization requires forms. Forms are sets of rules to follow to normalize your data into database tables. There are three forms that we will discuss: the first normal form, the second normal form, and the third normal form. Each of these forms has a set of rules to ensure that your database complies with the form. Each of the forms builds on the previous forms.

The first normal form

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