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<rows>
  <row>
    <dt_brand>dt_brand</dt_brand>     --1

    <c_bd />                                       --2
    <tb_posfy>0</tb_posfy>
  </row>
</rows>

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update tbc_eform_data
     set c_data.modify(\'replace value of (/rows/row/dt_brand/text())[1] with \'\'dt_brand1\'\'\')
 where c_eform_guid=\'5BEEE78F-6ED7-4E75-B494-9108D09345A1\'
   and c_id=\'1008-000001\'

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update tbc_eform_data
     set c_data.modify(\'delete /rows/row/c_bd[1]\')
where c_eform_guid=\'5BEEE78F-6ED7-4E75-B494-9108D09345A1\'
   and c_id=\'1008-000001\'

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update tbc_eform_data
     set c_data.modify(\'
 insert <c_bd>soga</c_bd>
   after (/rows/row/dt_brand)[1]\')        ---after��ʾ����dt_brand�ĺ�����Ҳ������before��Q���������
where c_eform_guid=\'5BEEE78F-6ED7-4E75-B494-9108D09345A1\'
   and c_id=\'1008-000001\'

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