Book Image

MongoDB Fundamentals

By : Amit Phaltankar, Juned Ahsan, Michael Harrison, Liviu Nedov
Book Image

MongoDB Fundamentals

By: Amit Phaltankar, Juned Ahsan, Michael Harrison, Liviu Nedov

Overview of this book

MongoDB is one of the most popular database technologies for handling large collections of data. This book will help MongoDB beginners develop the knowledge and skills to create databases and process data efficiently. Unlike other MongoDB books, MongoDB Fundamentals dives into cloud computing from the very start – showing you how to get started with Atlas in the first chapter. You will discover how to modify existing data, add new data into a database, and handle complex queries by creating aggregation pipelines. As you progress, you'll learn about the MongoDB replication architecture and configure a simple cluster. You will also get to grips with user authentication, as well as techniques for backing up and restoring data. Finally, you'll perform data visualization using MongoDB Charts. You will work on realistic projects that are presented as bitesize exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. Many of these mini-projects are based around a movie database case study, while the last chapter acts as a final project where you will use MongoDB to solve a real-world problem based on a bike-sharing app. By the end of this book, you'll have the skills and confidence to process large volumes of data and tackle your own projects using MongoDB.
Table of Contents (15 chapters)
Preface

Introduction

So far, we have covered querying using various operators to prepare query expressions. We have also learned how to create, delete, and modify documents in the collection, used various delete and update functions, and considered their differences and usability. We have also covered how to replace documents and how to perform upsert operations using a number of update operators. Now it is time to practice more complex update operations using the aggregation pipeline support, and learn how to modify arrays in a document.

We will begin this chapter with MongoDB pipeline support, where we will briefly introduce the aggregation pipeline and how it helps you to perform more complex update operations. We will then cover how to update array fields, how to add and sort elements of an existing array, and use an array as a set of unique elements. Next, you will learn how to remove the first, last, or another specific element from an array. Finally, you will learn how to prepare...