title: java.sql.SQLException: ORA-01501: CREATE DATABASE failed ORA-01100: database already mounted
body: <p>I made some MySQL java-jdbc code to create a database and add a few sample rows to it. I wanted to make this code work for oracle 11g also. So, I changed the connection URL in my code accordingly. But, now I am getting the error:</p>
  
  <p>java.sql.SQLException: ORA-01501: CREATE DATABASE failed
  ORA-01100: database already mounted</p>
  
  <p>I don't why am I getting this error. What does this mean "database already mounted" ? 
  Please help me to fix this problem.</p>
  
  <p>Thanks.</p>