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 select   to_char(sysdate   +   1   /   (24   *   60),'yyyy/mm/dd   hh24:mi:ss')   from   dual
SQL>   ;  
      1     select   to_char(sysdate,   'hh:mi:ss')  
      2     ,     to_char(sysdate   +   1/60/24,   'hh:mi:ss')  
      3     ,     to_char(sysdate   +   1/60/60/24,   'hh:mi:ss')  
      4*   from   dual  
  SQL>   /  
   
  TO_CHAR(SYSDATE,'HH:MI:SS')  
  ---------------------------------------------------------------------------  
  TO_CHAR(SYSDATE+1/60/24,'HH:MI:SS')  
  ---------------------------------------------------------------------------  
  TO_CHAR(SYSDATE+1/60/60/24,'HH:MI:SS')  
  ---------------------------------------------------------------------------  
  03:18:15  
  03:19:15  
  03:18:16  


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C:\Documents and Settings\oeg2006>imp
Import: Release 9.2.0.1.0 - Production on ÐÇÆÚÈý 11ÔÂ 25 19:24:12 2009
Copyright (c) 1982, 2002, Oracle Corporation.  A ......

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 SELECT max(SYS_CONNECT_BY_PATH(COLUMN_NAME, ','))
  from (SELECT A.COLUMN_NAME, ROWNUM AS ROWNO
          from USER_TAB_COLUMNS A
         WHERE TABLE_NAME = 'A_USER'
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[TEST@ora10gr1#2009-11-25/08:39:38]
SQL>create table t1(t timestamp);
Table created.
[TEST@ora10gr1#2009-11-25/08:39:56]
SQL>insert into t1 values(to_timestamp('21NOV09 10:04:12.032','DDMONYY HH24:MI:SS.FF'));
* ERROR at li ......

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