title: How to Connect local instance of oracle sql developer?
body: <p>I am absolute beginner to oracle and thought of getting started with installing Oracle Sql developer.
  Basically i downloaded the zip package and unzipped to program files and opened sqldeveloper.exe.
  Then I chose New connection and then filled the connection name,username,password and others but when I test the connection I get the following error.</p>
  
  <blockquote>
    <p>Status : Failure-Test failed: IO Error: The Network Adapter could not establish the connection</p>
  </blockquote>
  
  <p>I'm looking to connect to local database for practicing queries.
  How do I fix this, is there something else I should install?</p>