So you've learned how to aggregate and join data from tables in your database—now what? How do you manipulate, transform, and make the most sense of your data? This intermediate-level course will ...

#Now we have Left. Left is going to allow us to take a certain amount of strings from the left hand side. #Now let's look at substring, this one I personally love and use a lot. #Substring allows you ...

Abstract: Spark SQL is a big data processing tool for structured data query and analysis. However, due to the execution of Spark SQL, there are multiple times to write intermediate data to the disk, ...