get min and max from a specific column scala spark dataframe

Question

I would like to access to the min and max of a specific column from my dataframe but I don\'t have the header of the column, just its number, so I should I do using scala ?

Answer 1

Using spark functions min and max, you can find min or max values for any column in a data frame.

import org.apache.spark.sql.functions.{min, max}

val df = Seq((5, 2), (10, 1)).toDF("A", "B")

df.agg(max($"A"), min($"B")).show()
/*
+------+------+
|max(A)|min(B)|
+------+------+
|    10|     1|
+------+------+
*/