November 2018
Intermediate to advanced
384 pages
12h 21m
English
book
Programming Skills for Data Science: Start Writing Code to Wrangle, Analyze, and Visualize Data with R, First Edition
by Joel Ross, Michael Freeman
Content preview from Programming Skills for Data Science: Start Writing Code to Wrangle, Analyze, and Visualize Data with R, First Edition
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13Accessing Databases
This chapter introduces relational databases as a way to structure and organize complex data sets. After introducing the purpose and format of relational databases, it describes the syntax for interacting with them using R. By the end of the chapter you will be able to wrangle data from a database.
13.1 An Overview of Relational Databases
Simple data sets can be stored and loaded from .csv files, and are readily represented in the computer’s memory as a data frame. This structure works great for data that is structured just as a set of observations made up of features. However, as data sets become more complex, you run against some limitations.
In particular, your data may not be structured in a way that it can easily ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.