title: How to paste columns from separate files using bash?
body: <p>Using the following data:</p>
  
  <pre><code>$cat date1.csv
   Bob,2013-06-03T17:18:07
   James,2013-06-03T17:18:07
   Kevin,2013-06-03T17:18:07
  
  $cat date2.csv
   2012-12-02T18:30:31
   2012-12-02T18:28:37
   2013-06-01T12:16:05
  </code></pre>
  
  <p>How can date1.csv and date2.csv files be merged?  Output desired:</p>
  
  <pre><code>$cat merge-date1-date2.csv
   Bob,2013-06-03T17:18:07,2012-12-02T18:30:31
   James,2013-06-03T17:18:07,2012-12-02T18:28:37
   Kevin,2013-06-03T17:18:07,2013-06-01T12:16:05
  </code></pre>
  
  <p>Please note: the best solution will be able to quickly manage a massive number of lines.  </p>