What is the use of GROUPING SETS clause in Hive queries? This is little bit rarely used clause but it…
This post will explain the difference between the SQL functions rownum and rowid. ROWID : 1). ROWID is a…
In most of your interviews you might have came across the question to write word count program in MapReduce or…
Currying in Scala is a technique of transforming a function that takes multiple arguments into a function that takes only…
Higher Order functions take other functions as parameters and return function as result, i.e., passing functions as parameters to other…
Even though Spark is very faster compared to Hadoop, Spark 1.6x has some performance issues which are corrected in Spark…
1). How to convert an external table to internal table? We can achieve this by using below command: ALTER TABLE…
We will never think of this kind of scenarios when we work with Hive tables in our projects. But in…
Most of us might have worked on Hive in projects. But we never get a requirement to update records in…
Similar questions: Coalesce vs. spark.sql.shuffle.partitions Coalesce vs repartition vs spark.sql.shuffle.partitions Not a frequently asked question but there are chances…