title: String concatenation within INFORMIX-SQL "Perform" screens
body: <p>How can I concatenate two char columns within a perform screen?</p>
  
  <p>example:</p>
  
  <p>table sample</p>
  
  <p>col1 char(1),
  col2 char(1)</p>
  
  <p>.
  .</p>
  
  <p>after editadd of sample</p>
  
  <p>let label_3 = sample.col1 + sample.col2</p>
  
  <p>.. this didn't work, I even tried using subscripts for the 2 cols but no dice!</p>