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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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