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/* Formatted on 2009/12/02 16:01 (Formatter Plus v4.8.8) */
SELECT TO_CHAR (TO_DATE ('2009-12-02', 'YYYY-MM-DD'), 'WW')
  from DUAL;
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/* Formatted on 2009/12/02 15:31 (Formatter Plus v4.8.8) */
SELECT TO_CHAR
          (DECODE
              (SIGN
                  (  (  TO_DATE ('2009-12-02', 'YYYY-MM-DD')
                      + TO_NUMBER
                              (DECODE (TO_CHAR (TRUNC (TO_DATE ('2009-12-02',
                                                                'YYYY-MM-DD'
                                                               ),
                                &nb


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