Book Image

The MySQL Workshop

By : Thomas Pettit, Scott Cosentino
5 (1)
Book Image

The MySQL Workshop

5 (1)
By: Thomas Pettit, Scott Cosentino

Overview of this book

Do you want to learn how to create and maintain databases effectively? Are you looking for simple answers to basic MySQL questions as well as straightforward examples that you can use at work? If so, this workshop is the right choice for you. Designed to build your confidence through hands-on practice, this book uses a simple approach that focuses on the practical, so you can get straight down to business without having to wade through pages and pages of dull, dry theory. As you work through bite-sized exercises and activities, you'll learn how to use different MySQL tools to create a database and manage the data within it. You'll see how to transfer data between a MySQL database and other sources, and use real-world datasets to gain valuable experience of manipulating and gaining insights from data. As you progress, you'll discover how to protect your database by managing user permissions and performing logical backups and restores. If you've already tried to teach yourself SQL, but haven't been able to make the leap from understanding simple queries to working on live projects with a real database management system, The MySQL Workshop will get you on the right track. By the end of this MySQL book, you'll have the knowledge, skills, and confidence to advance your career and tackle your own ambitious projects with MySQL.
Table of Contents (22 chapters)
1
Section 1: Creating Your Database
6
Section 2: Managing Your Database
11
Section 3: Querying Your Database
16
Section 4: Protecting Your Database

Loading data from a JSON file

MySQL uses a format of a file with one JSON document per line to allow quick and easy import of documents into a database. To import JSON documents into collections in MySQL, we can use MySQL Shell with the util.importJson() function.

For example, if you need to import a JSON file named languages.json, then you write the following command:

util.importJson('/path/to/languages.json')

Ensure that you give the correct path to the JSON file.

In order to update the schema names, use the \rehash command. Once you have updated the schema names, you can view the data of the collection using the following command:

db.languages.find()

You can also sort the details of a collection using the sort() method. Here, you need to specify the column name inside the method. Consider a scenario where you need to sort the passenger details in the airports file, and then find the airport having the highest number of passengers. In this case, you write...