title: db4o querying subobject
body: <p>I've just started with db4o and I stumbled on to a problem.</p>
  
  <p>I have an object with a subobject (it is probably not the correct word but I hope you get what I mean).</p>
  
  <p>The subobject contains two dates, one start date and one end date.</p>
  
  <p>I would like to show the main object if it has at least one sub object where DateTime.Now is inbetween the start and end date.</p>
  
  <p>I have to use native query or SODA (linq isn't working in the project).</p>
  
  <p>Thanks in advance!</p>
  
  <p>/Fredrik</p>