title: get part of a Tree Structure in Crystal Reports
body: <p>I have the tree stucture of the departments of a company.
  The link for the Parent-Child department in the table is: 
  Departments.ID->Departments.parentID.
  However I don't need the whole tree. 
  The thing is that the structure of the departments has changed during the years and I would like to keep only a part of the tree.
  For example: </p>
  
  <pre><code>-Root
  --Parent 1
  ---Child 01
  ---Child 02
  --Parent 2
  ---Child 01
  ---Child 02 (This is the parent that I want to have in my "shorter" tree
  ----Child 001 (This is the part of the tree that I want. The depth is more than 1)
  ---Child 04
  --Parent 03
  </code></pre>
  
  <p>Can I say something like "get me everything under <code>Child 001</code>"?
  Does this even makes sense?
  Thanks for any advice.</p>