title: How is redundant data avoided in non relational databases?
body: <p>I want to move to mongoose, but I need to understand how my mysql tables will map over to no-sql based databases.</p>
  
  <p>In particular I use joins to avoid replicating data.  That is if I have 2 tables ( B &amp; C ) that related 1 table ( A ).  I can just join table A to B when needed or join table A to C when needed.</p>
  
  <p>How would this work in mongoose/mongodb i.e. noSQL.</p>