SQL & PL/SQL

this is the raw data;

SQL SELECT 
  2  DT             ,
  3  CODE       ,
  4  NO         
  5  FROM TB
  6  WHERE DT BETWEEN TO_DATE('01/01/2000','DD/MM/YYYY') AND TO_DATE('31/12/2009','DD/MM/YYYY')
  7  AND BCODE BETWEEN 'B01' AND 'B01'
  8  AND SCODE BETWEEN 'S07' AND 'S07';

DT        CODE              NO
--------- ------ -------------
21-JAN-08 BUY           11.000
06-JAN-08 BUY           12.000
14-JUL-08 SEL            4.000
15-SEP-08 SEL            5.000
13-JAN-09 SEL            6.000

I want the result to give me rownum and sort it dt wise
i put this query, but saw that row no. 2 of the ROWNUM COL, coming first with the sorted dt wise row.

SQL; SELECT rownum,
  2  DT             ,
  3  CODE       ,
  4  NO         
  5  FROM TB
  6  WHERE DT BETWEEN TO_DATE('01/01/2000','DD/MM/YYYY') AND TO_DATE('31/12/2009','DD/MM/YYYY')
  7  AND   BCODE BETWEEN 'B01' AND 'B01'
  8  AND   SCODE BETWEEN 'S07' AND 'S07'
  9  order by invxh_DATE;

       ROWNUM DT        CODE              NO
------------- --------- ------ -------------
        2.000 06-JAN-08 BUY           12.000
        1.000 21-JAN-08 BUY           11.000
        3.000 14-JUL-08 SEL            4.000
        4.000 15-SEP-08 SEL            5.000
        5.000 13-JAN-09 SEL            6.000

i want rownum to be generetd dt wise, something like;

       ROWNUM DT        CODE              NO
------------- --------- ------ -------------
        1.000 06-JAN-08 BUY           12.000
        2.000 21-JAN-08 BUY           11.000
        3.000 14-JUL-08 SEL            4.000
        4.000 15-SEP-08 SEL            5.000
        5.000 13-JAN-09 SEL            6.000