title: How to connect sql developer to Oracle database using instant client_12_1
body: <p>I have downloaded the oracle instant client 12_1 but i'm unable to connect to the oracle database.when i tried using sql developer it is displaying the following error.</p>
  
  <p>The Network could not be established.</p>
  
  <p>I'm using windows 7 and my Oracle_home path is defautly set in the system variables as</p>
  
  <p>path  </p>
  
  <p>E:\app\dell\product\11.2.0\dbhome\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\</p>