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)

Creating, updating, or deleting documents

In MongoDB, the document is the lowest atomic unit that can be addressed. As mentioned in Chapter 2, Understanding MongoDB Data Structures, a document is a JSON expression that contains a set of key:value pairs. The key is the name of the field and the value is the actual data used to form the document.

The MongoDB API consistently provides methods for both single and multiple operations. The generic form is (insert|update|delete)(One|Many)(). So, for example, if you wish to insert many documents, use insertMany(). If you only wish to delete only one, use deleteOne(), and so forth.

Creating one or more documents

Command summary (discussed in the following):

  • db.<collection>...