title: Is there a way around for SSIS data migration
body: <p>Im totally unfamiliar with SSIS migration. So I appreciate the help. </p>
  
  <p>I am doing the derivation for one column from source to destination. 
  the problem is:</p>
  
  <p>Existing column: nVarchar(30)
  Destination column: nVarchar(12)</p>
  
  <p>How do I migrate the data or is there a way to write expression on derived column? </p>
  
  <p>Also I m doing the same thing for another column: 
  Derive from Feature, if not NULL then set to TRUE</p>
  
  <p>How do I write expression on derived column?</p>
  
  <p>Thanks</p>