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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.…

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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…

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Posted in: Uncategorized

Recent Posts

  • How to delete duplicate records in Hive (or) How to extract unique records in Hive using analytical functions.
  • RANK() vs DENSE_RANK() vs ROW_NUMBER() in Hive (or) Differences between RANK(), DENSE_RANK() and ROW_NUMBER() (or) Ranking window functions in Hive
  • How to calculate moving sum or moving average in Hive?

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