JavaScript (Node.js) and Databases: A Practical Guide

This book will be your reliable guide to integrating JavaScript (Node.js) with modern databases. Unlike abstract theoretical manuals, the author offers concentrated practical experience that can be immediately applied in real projects.

Who is this book for?

• Beginner developers who have already mastered the basics of Node.js and want to learn how to work with data.
• Experienced programmers who want to systematize their knowledge and learn new approaches (ORM, connection pools, transactions).
• Full-stack developers looking to master the backend part using Node.js.

What you will learn from the book:

• How to set up and connect relational databases (SQLite, PostgreSQL, MySQL) to a Node.js application.
• Working with NoSQL databases (MongoDB) and their differences from SQL solutions.
• Writing secure SQL queries with parameterization to protect against SQL injection.
• Using popular libraries: pg, mysql2, sqlite3, mongoose, sequelize.
• Designing data schemas and migrations.
• Performance optimization: connection pools, indexes, query caching.
• Error handling and transactions to ensure data integrity.
• Deploying applications with databases to production (Docker, cloud services).

Structure and approach: Each chapter contains ready-made code examples that you can copy and run. You will start with simple SQLite (ideal for prototypes), then move on to powerful PostgreSQL, and finish with flexible MongoDB. The book is built on the principle of "from simple to complex": from creating a table to building a full-fledged REST API with CRUD operations.

Why do you need this book? The market demands that developers have the skills to work with data. This book will fill gaps in your knowledge, show best practices, and eliminate typical beginner mistakes. You won't just read theory — you will create several projects that you can add to your portfolio.

The book is suitable both for self-study and for use as a reference guide. All examples are tested on current versions of Node.js 18+ and corresponding database drivers.

Start your journey to creating reliable and scalable backend applications with this practical guide!