title: Compare particular column of two csv files using diff command
body: <p>I tried to compare two csv files using below command.</p>
  
  <pre><code>diff --changed-group-format='%&gt;' --unchanged-group-format='' test2.csv test.csv &gt;&gt; testfile3.csv
  </code></pre>
  
  <p>But I need to compare particular column of two csv files using diff command and get differed values. </p>
  
  <p>For example:</p>
  
  <pre><code>file 1
  1|9865|0|21
  2|5698|0|22
  3|2546|0|90
  
  file2
  1|9865|0|34
  2|1452|9|33
  3|2546|0|50
  
  expected output:
  2|5698|0|22
  </code></pre>
  
  <p>Give me your valuable suggestions/ideas.</p>