title: Concat multiple values of a single field in one row in crystal report's detail section
body: <p>I am new at crystal report. I am developing a report where i need the displayed output like below:</p>
  
  <h2>Item Code| Description| Unit | Serial</h2>
  
  <p>110007   |ABC         |PCs   |TU123416, TU676218, TU789761 </p>
  
  <p>There are multiple serial numbers for each item. I want to concat those serials with comma.</p>
  
  <p>I tried few solutions but each of them shows serial number at group footer section.</p>