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PySpark Select First Row of Each Group?

Post author:NNK
Post category:PySpark

In PySpark select/find the first row of each group within a DataFrame can be get by grouping the data using window partitionBy() function and running row_number() function over window partition. let's see with an example. 1. Prepare Data & DataFrame Before we start let's create the PySpark DataFrame with 3…

Spark DataFrame Select First Row of Each Group?

Post author:NNK
Post category:Apache Spark

In this Spark article, I've explained how to select/get the first row, min (minimum), max (maximum) of each group in DataFrame using Spark SQL window functions and Scala example. Though I've explained here with Scala, the same method could be used to working with PySpark and Python. 1. Preparing Data…