title: using HQL to concatenate strings from multiple rows
body: <p>Consider a table holding names, with three rows:</p>
  
  <p>Peter
  Paul
  Mary</p>
  
  <p>using NHibernate HQL I want to  retrieve all the names as a single string  "Peter, Paul, Mary" to put it inside a single DTO object field. is there a way to do this kind of concatenation? </p>