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TO_DATE¸ñʽ(ÒÔʱ¼ä:2007-11-02   13:45:25ΪÀý)
  
        Year:     
        yy two digits Á½Î»Äê                ÏÔʾֵ:07
        yyy three digits ÈýλÄê                ÏÔʾֵ:007
        yyyy four digits ËÄλÄê                ÏÔʾֵ:2007
           
        Month:     
        mm    number     Á½Î»Ô              ÏÔʾֵ:11
        mon    abbreviated ×Ö·û¼¯±íʾ          ÏÔʾֵ:11ÔÂ,ÈôÊÇÓ¢ÎÄ°æ,ÏÔʾnov    
        month spelled out ×Ö·û¼¯±íʾ          ÏÔʾֵ:11ÔÂ,ÈôÊÇÓ¢ÎÄ°æ,ÏÔʾnovember
         
        Day:     
        dd    number         µ±Ôµڼ¸Ìì        ÏÔʾֵ:02
        ddd    number         µ±ÄêµÚ¼¸Ìì        ÏÔʾֵ:02
        dy    abbreviated µ±Öܵڼ¸Ìì¼òд    ÏÔʾֵ:ÐÇÆÚÎå,ÈôÊÇÓ¢ÎÄ°æ,


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User Name£ºorcl
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Host String£ºorcl as sysdba
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Oracle °Ù·Ö±È

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Select Round((discount/Amount),2) from dual;
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