title: A questions about database structures and lots of functions ala Reddit
body: <p>I have a question about how a bookmarking site like Reddit would manage all the 'votes' a user has logged.</p>
  
  <p>For example when I (User_ID_292929) vote up a post (Post_ID_282828) logically somewhere in a database it says that User_ID_292929 has voted up Post_ID_282828. </p>
  
  <p>But how would that be structuralized in the DB? Would the table that handels user profiles have a a field that is full of comma seperated values and it gets exploded and checked to see if the posts on the page that's being loaded has been voted up?</p>
  
  <p>I'm not looking for a long answer but more a example program or documentation on a similar structure.</p>
  
  <p>Thanks</p>