如何在火花中将两列的值合并为一列？

Question

I have this dataset:

A	B
1	3
2	3
2	2

And I want to merge it like:

NewColumn
1.3
2.3
2.2

Answer 1

You can use concat function for this purpose. To add a delimiter, you can use lit() function. This yields output with just a concatenated column.

df.select(concat(col("A"),lit('.'),col("B")).as("NewColumn")).show(false)