Databricks Certified Associate Developer for Apache Spark
Get started today
Ultimate access to all questions.
Comments
Loading comments...
Ultimate access to all questions.
Which of the following argument pairs cannot be used in DataFrame.join() to perform an inner join between two DataFrames (aliased as "a" and "b") on two key columns named column1 and column2?
A
on = [a.column1 == b.column1, a.column2 == b.column2]
B
on = [col("column1"), col("column2")]
C
on = [col("a.column1") == col("b.column1"), col("a.column2") == col("b.column2")]
D
on = ["column1", "column2"]