title: Cannot connect to oracle pluggable database
body: <p>Iinstalled oracle in my Windows 10 64 bit pc and I started doing verification steps mentioned in the tutorial which's given in the oracle website which can be found in the link below.</p>
  
  <p><a href="http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/12c/r1/Windows_DB_Install_OBE/Installing_Oracle_Db12c_Windows.html" rel="nofollow noreferrer">http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/12c/r1/Windows_DB_Install_OBE/Installing_Oracle_Db12c_Windows.html</a></p>
  
  <p>When I try to connect to my pluggable database using this command </p>
  
  <pre><code>C:\Users\Chathura&gt;sqlplus sys/Oracle_1@orclpdb as sysdba;
  </code></pre>
  
  <p>it gives me following message </p>
  
  <pre><code>SQL*Plus: Release 12.2.0.1.0 Production on Tue Jan 30 19:34:25 2018
  
  Copyright (c) 1982, 2016, Oracle.  All rights reserved.
  
  ERROR:
  ORA-12154: TNS:could not resolve the connect identifier specified
  
  
  Enter user-name:
  </code></pre>
  
  <p>But when I try to connect to container database it connects successfully.</p>
  
  <p>This is how I created pluggable database.</p>
  
  <p><a href="https://i.stack.imgur.com/I1sFE.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/I1sFE.jpg" alt="enter image description here"></a></p>
  
  <p>I read articles regarding this tried adding TNS_ADMIN system variable too, but non of those worked. 
  What I am doing wrong here?    </p>