title: creating new instance oracle
body: <p>I installed oracle server 12c.
  In the instalation I created the 'default' instance 'orcl.xxxxxxx.local'.
  after that I created a table space and after that I created an user and give some grants.
  I logged to me table space and it worked fine.</p>
  
  <p>but now I want to create a new instance. I'm a little confused about whats is really a instance in Oracle. how can I create a new instance?
  anyway, I'm using SQL*PLUS to do all that.</p>
  
  <p>thanks.</p>