title: How to insert new values in MySql tables only those differents from rows that already exists?
body: <p>I have a database1 in one computer and a database2 (mirrror) in another computer.</p>
  
  <p>Db1 is updated. I should update db2 once a week. To do this task I coulde make a dump from db1 e delete and reload de dump in computer 2. But in fact only one table changes data.
  Is there a way to insert into this table (in db2) only the new values from db1 ?</p>
  
  <p>Note: I could do thins using php code. But I am trying to know if is there a way to do that directly in mysql.</p>