September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Spark SQL
The answer is yes and the module is called Spark SQL. Spark SQL sits on top of Spark Core and allows the manipulation of structured data. Unlike with the basic RDD API, the DataFrame API provides more information to the Spark engine. Using this information, it can change the execution plan and optimize it.
You can also use the module to execute SQL queries as you would with a relational database. It makes it easy for people comfortable with SQL to run queries on heterogeneous sources of data. You can, for instance, join a data table coming from a CSV file with another one stored in Parquet in a Hadoop filesystem and with yet another one coming from a relational database.
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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.