title: How can I know the username and password if I only have a .sql file
body: <p>I am attempting to use Java servlet to access an existing .sql file via JDBC. The aim is to develop a RESTful web service to insert, edit, update, delete the data in the database.</p>
  
  <p>As this is the first time I do it, I am confused by one question:</p>
  
  <p>As I am to set up JDBC connection, how do we know the username, password and driver information? They are not shown in the .sql file I have.</p>