Best way to get the max value in a Spark dataframe column

Question

I\'m trying to figure out the best way to get the largest value in a Spark dataframe column.

Consider the following example:

df = spark.createDataFra         


        

Answer 1

In case some wonders how to do it using Scala (using Spark 2.0.+), here you go:

scala> df.createOrReplaceTempView("TEMP_DF")
scala> val myMax = spark.sql("SELECT MAX(x) as maxval FROM TEMP_DF").
    collect()(0).getInt(0)
scala> print(myMax)
117