title: Datatable subset of columns from another datatable
body: <p>I have a datatable with 17 columns and a bunch of data.</p>
  
  <p>I wnat a datatable with only 6 of the columns and the data for those 6 columns.</p>
  
  <p>So I need a subset of the original datatable.</p>
  
  <p>How do I loop through the original datatable with 17 columns and end up with a datatable with only the 6 columns I want with the corresponding data for those 6 columns?</p>