how to create empty data frame in scala

To create an empty DataFrame in Scala, you can use the createDataFrame method from the SparkSession class and pass an empty Seq or List as the data parameter. Here's an example:

import org.apache.spark.sql.{SparkSession, DataFrame}

val spark = SparkSession.builder()
  .appName("Empty DataFrame Example")

val emptyData = Seq.empty[(String, Int)]
val emptyDF: DataFrame = spark.createDataFrame(emptyData)

This code snippet creates an empty DataFrame by passing an empty Seq of tuples to the createDataFrame method. The emptyDF variable represents the resulting empty DataFrame. Finally, the show method is called to display the empty DataFrame.

Note that you need to have Apache Spark set up in your Scala environment to use the SparkSession class and create DataFrames.