how to get all the column names as a new colmn in another file

Hi I have a file conating around 20 columns . I want to get the list of all column names as a single column in another file. Please help . For eg I have file customer having columns [cust_id,cust_name,age,....batch_id].
I want a column in another file {column name} conatining values
{cust_id
cust_name
age
.
.
.
batch_id}.

any transformation in spoon to do it? :confused: