title: Adding a new Column to existing SAS dataset
body: <p>I have a SAS dataset that I have created by reading in a .txt file. It has about 20-25 rows and I'd like to add a new column that assigns an alphabet in serial order to each row.</p>
  
  <p>Row 1 A</p>
  
  <p>Row 2 B</p>
  
  <p>Row 3 C
  .......</p>
  
  <p>It sounds like a really basic question and one that should have an easy solution, but unfortunately, I'm unable to find this anywhere. I get solutions for adding new calculated columns and so on, but in my case, I just want to add a new column to my existing  datatable - there is no other relation between the variables. </p>