title: Sort DBGrid by clicking column's title
body: <p>Well, this seems a little tricky (if not imposible). I'm trying to make my DBGrid sort its data by clicking on column's title.</p>
  
  <p>The thing is that I'm (sadly) working with Delphi 3, I'm not using ADO DataSets and the query gets a lot of rows, thus I can't reopen my TQuery changing the <code>order by</code> clause on clicks.</p>
  
  <p>Someone has implemented something like this?</p>