select to_timestamp('2015-05-08T23:39:20.123-07:00') as "TIMESTAMP1",
       date_trunc('HOUR', "TIMESTAMP1") as "TRUNCATED TO HOUR",
       date_trunc('MINUTE', "TIMESTAMP1") as "TRUNCATED TO MINUTE",
       date_trunc('SECOND', "TIMESTAMP1") as "TRUNCATED TO SECOND";