Spark SQL Window () Powerful ways

Spark window function perform calculations & aggregations on certain data groups than entire dataset. Also, handles ranking, cumulative sum and averages.

How to Create udf() in PySpark

UDF (User-Defined Function) is used for custom data transformations or calculations which are not available in the built-in Spark SQL functions

How to Use union() Function in PySpark

the union() function is used to combine two dataframes with the same schema. It creates a new dataframe that includes all the rows from both dataframes

Compare foreach() and foreachPartition()

foreach() and foreachPartition() are used to apply function to each element of Dataframe or RDD. they differ in behavior and usage when used with distributed data