title: Default timestamp showing local time in oracle
body: <p>I have created a table with created_time column which is having default time as systimestamp. 
  When I insert  a row to it the time is showing my local time like. 
  23-02-18 08:49:05.430419000 AM</p>
  
  <p>But when I query select systimstamp from dual it is showing GMT like 
  23-02-18 05:11:04.225141000 AM +00:00</p>
  
  <p>How can I make sure that the default timestamp also consider GMT?</p>
  
  <pre><code>CREATE TABLE TS_TEST (
  MY_NAME VARCHAR2(100),
  created_time TIMESTAMP(6) default CURRENT_TIMESTAMP
  );
  insert into TS_TEST (MY_NAME) Values ('george');
  </code></pre>
  
  <p>I want the created_time column should be always in GMT</p>