title: VIM: insert or delete data based on position
body: <p>I have a text file I am trying to set up to import into my DB.  I need to delete everything on each line after a certain position on the line.  I also need to insert commas into multiple fixed positions on each line.  The end goal being a csv file which I will import into my DB.</p>
  
  <p>I assume there is a regex or VIM command to insert delete by position but I am very new to both and my searches have not provided a good answer.</p>