Book Image

MongoDB 4 Quick Start Guide

By : Doug Bierer
Book Image

MongoDB 4 Quick Start Guide

By: Doug Bierer

Overview of this book

MongoDB has grown to become the de facto NoSQL database with millions of users, from small start-ups to Fortune 500 companies. It can solve problems that are considered difficult, if not impossible, for aging RDBMS technologies. Written for version 4 of MongoDB, this book is the easiest way to get started with MongoDB. You will start by getting a MongoDB installation up and running in a safe and secure manner. You will learn how to perform mission-critical create, read, update, and delete operations, and set up database security. You will also learn about advanced features of MongoDB such as the aggregation pipeline, replication, and sharding. You will learn how to build a simple web application that uses MongoDB to respond to AJAX queries, and see how to make use of the MongoDB programming language driver for PHP. The examples incorporate new features available in MongoDB version 4 where appropriate.
Table of Contents (11 chapters)

Summary

In this chapter, you learned how to conduct complex queries using the aggregation pipeline framework. You learned about stages, expression operators, and how to accumulate information such as sum, average, and so on. One of the most important aspects of the aggregation pipeline framework that you learned about in this chapter is the ability to access embedded objects or arrays.

You also learned about single-purpose aggregation (for example, sort and limit), as well as how to use map-reduce. You learned that, although map-reduce gives you flexibility in that JavaScript functions can be used, the aggregation framework is preferred as it uses native MongoDB methods and offers better performance.

In the next chapter, you will learn about how to maintain MongoDB performance.