Question

Is there is any possibility in database, What ever time i am given which should store as GMT time stamp. If it so, Please share me.

Answer 1

For PostgreSQL, your table should have a column of type timestamp with time zone (timestamptz for short) like this:

CREATE TABLE tbl (id serial, ts timestamptz);

If what you want to store (let’s call it my_ts) is …

• a local timestamp without time zone, i.e. it agrees with the current setting of timezone in your client:
  Insert as is, everything is saved as UTC automatically internally:

  INSERT INTO tbl (ts) VALUES my_ts'
  

• a timestamp with time zone:
  Insert as is, everything is saved as UTC automatically internally:

  INSERT INTO tbl (ts) VALUES my_ts;
  

• a timestamp without time zone but from another time zone:
  Say, you get timestamp without time zone values from the Olympic Games in London, but your client thinks you are at a different time zone. Transform the timestamp with the AT TIME ZONE construct:

  INSERT INTO tbl (ts) VALUES my_ts AT TIME ZONE 'Europe/London';
  

If you use the time zone name (instead of a time zone abbreviation, BST in this case), DST (daylight saving time) rules are applied automatically. Details in this related question.
More about timestamp handling in PostgreSQL in this related answer.

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Now, if you want to display tbl.ts as UTC (~ GMT) timestamp without time zone, regardless of your current time zone, retrieve the values like this:

SELECT ts AT TIME ZONE 'UTC' FROM tbl;

Note that AT TIME ZONE has a different effect when applied to timestamptz than with timestamp! Read the manual carefully.