title: Can 2 Oracle database instances listen on the same port on the same machine
body: <p>I have installed windows 7 64 bit os on my machine and installed oracle 12c database on the machine. Database software got installed properly and i'm able to connect using sql developer client. The database instance is listening on port 1521.  I have also installed oracle xe 11g edition. During the installation i did not get any errors and I got the message that installation is successful and complete. However, when i try to access it using sqldeveloper tool, the listener seem to be refusing the connection. How can i make both xe and 12c work on the same machine. Please let me know your suggestions. </p>
  
  <p>How can i make them work both at the same time. I have seen cases where 2 instances use same port on the same machine. </p>
  
  <p>Thank you.</p>