Apache Spark

ALIAS is defined in order to make columns or tables name more readable or even shorter. If you wish to rename your columns while displaying it to the user or if you are using tables in joins then you may need to have alias for table names. Other than making column names or table names […]

In this post, we will see how to fetch data from HIVE table into SPARK DataFrame and perform few SQL like “SELECT” operations on it. I have a table in HIVE database which has details of all the US Presidents (src: https://en.wikipedia.org/) .If you don’t know how to create table in hive or load data