How can we load to a column in a relational table which is not null but the incoming value from HDFS has a null value?

How can we load to a column in a relational table which is not null bu

1.	How can we load to a column in a relational table which is not null but the incoming value from HDFS has a null value?
Answer» By using the –input-null-string parameter we can specify a default value and that will allow the row to be inserted into the target table.