Book Image

Getting Started with RethinkDB

By : Gianluca Tiepolo
Book Image

Getting Started with RethinkDB

By: Gianluca Tiepolo

Overview of this book

RethinkDB is a high-performance document-oriented database with a unique set of features. This increasingly popular NoSQL database is used to develop real-time web applications and, together with Node.js, it can be used to easily deploy them to the cloud with very little difficulty. Getting Started with RethinkDB is designed to get you working with RethinkDB as quickly as possible. Starting with the installation and configuration process, you will learn how to start importing data into the database and run simple queries using the intuitive ReQL query language. After successfully running a few simple queries, you will be introduced to other topics such as clustering and sharding. You will get to know how to set up a cluster of RethinkDB nodes and spread database load across multiple machines. We will then move on to advanced queries and optimization techniques. You will discover how to work with RethinkDB from a Node.js environment and find out all about deployment techniques. Finally, we’ll finish by working on a fully-fledged example that uses the Node.js framework and advanced features such as Changefeeds to develop a real-time web application.
Table of Contents (15 chapters)
Getting Started with RethinkDB
Credits
About the Author
Acknowledgement
About the Reviewer
www.PacktPub.com
Preface
Index

Advanced queries


Over the past chapters, we've looked at quite a few different queries. We've seen how to create tables, insert and remove data, filter data based on conditions, and efficiently query data using queries.

Although, these queries are the most common types of queries you will use, sometimes you may want to write more complex queries, especially when working with large datasets. In this section, you will learn new ReQL commands and use RethinkDB's advanced features to run more advanced queries.

We will start by looking at three extremely useful queries.

Limits, skips, and sorts

The most common queries in a database system are read queries, which make use of RethinkDB's filter command or, in case you're using an index, the getAll command. There are a number of query options that can be appended at the end of these queries; these include limiting the number of documents returned, skipping a number of documents, and ordering documents.

The ReQL query language is extremely expressive...