Oracle timestamp

SQL> create table a10(id int,data_date timestamp);

Table created.

SQL> insert into a10 values(1,date'2015-09-02');

1 row created.

SQL>  insert into a10 values( 2, to_date('201208161100', 'YYYYMMDDHH24MI'));

1 row created.

SQL> commit;

Commit complete.

SQL> select * from a10;

	ID
----------
DATA_DATE
---------------------------------------------------------------------------
	 1
02-9月 -15 12.00.00.000000 上午

	 2
16-8月 -12 11.00.00.000000 上午


SQL> set linesize 200
SQL> 
SQL> /

	ID DATA_DATE
---------- ---------------------------------------------------------------------------
         1 02-9月 -15 12.00.00.000000 上午
         2 16-8月 -12 11.00.00.000000 上午



SQL>  update a10 set data_date= to_date('201508161100', 'YYYYMMDDHH24MI') where id=2;

1 row updated.

SQL> select * from a10;

	ID DATA_DATE
---------- ---------------------------------------------------------------------------
         1 02-9月 -15 12.00.00.000000 上午
         2 16-8月 -15 11.00.00.000000 上午