title: How to use awk for a compressed file
body: <p>How can I change the following command for a compressed file?</p>
  
  <pre><code>awk 'FNR==NR { array[$1,$2]=$8; next } ($1,$2) in array { print $0 ";" array[$1,$2] }' input1.vcf input2.vcf
  </code></pre>
  
  <p>The command working fine with normal file. I need to change the command for compressed files.</p>