Skip to content
Big Data Interview
The Interview Hacker and Technical guide
  • Home
  • Blogs
  • About Us
  • Contact Us
  • Privacy Policy

Month: March 2020

How to create a dataframe with custom schema in Spark?

March 30, 2020 admin 1 Comment

How to create a dataframe using a custom schema in Spark? This is one of the most common interview questions.…

Continue Reading →

Posted in: Spark, Spark SQL

ROWID vs ROWNUM (or) What is the difference between ROWID and ROWNUM?

March 8, 2020 admin Leave a comment

This post will explain the difference between the SQL functions rownum and rowid.   ROWID : 1). ROWID is a…

Continue Reading →

Posted in: Uncategorized

Recent Posts

  • Save action in Spark takes too long time/Save operation spills huge data on to disk and fails with the error “No space left on device”
  • How to set configuration to start Reduce jobs after completion of certain proportion of the Map jobs in Hive or Hadoop?
  • HDFS commands

Recent Comments

  • curry 7 sour patch on Spark groupByKey vs reduceByKey vs aggregateByKey
  • jordan 4 on Hive – Order By vs Sort By vs Cluster By vs Distribute By
  • louboutin shoes on Spark RDD vs Dataframe vs Dataset

Archives

  • August 2021
  • June 2021
  • May 2021
  • January 2021
  • December 2020
  • October 2020
  • July 2020
  • May 2020
  • April 2020
  • March 2020
  • November 2019
  • July 2019
  • June 2019
  • May 2019

Follow Us

Contact Us

  • Email
    sparkandbigdatainterview@gmail.com
Privacy Policy
Copyright © 2022 Big Data Interview