data frames and data sets

Hi @roshanbi 

Apache Spark offers several methods to use when selecting a column.

Scala Spark:

// Scala
import org.apache.spark.sql.functions.{expr, col, column}
// 6 ways to select a column
df.select(df.col("ColumnName"))
df.select(col("ColumnName"))
df.select(column("ColumnName")) 
df.select(`ColumnName)
df.select($"ColumnName")
df.select(expr("ColumnName"))

PySpark:

# Python
from pyspark.sql.functions import expr, col, column
# 4 ways to select a column
df.select(df.ColumnName)
df.select(col("ColumnName"))
df.select(column("ColumnName"))
df.select(expr("ColumnName"))