--修改FunctionNo节点值，@OperateFunctionNo为参数

set @DataXml.modify('replace value of (/CrudData/FunctionNo/text())[1] with sql:variable("@OperateFunctionNo")')

--删除节点

SET @DataXml.modify('delete (/CrudData/DataKey)[1]')

--插入节点

SET @DataXml.modify('insert <DataKey></DataKey> as first into (/CrudData)[1]')

--插入文本

SET @DataXml.modify('insert text{sql:variable("@DataKey")} as first into (/CrudData/DataKey)[1]')

--DataKeyList值获取

SET @DataKeyList = @DataXml.value('(/CrudData/DataKeyList)[1]', 'nvarchar(max)')

<CrudData>

  <ConnKey>SupplierData</ConnKey>

  <AppNo>20</AppNo>

  <FunctionNo>200000</FunctionNo>

  <Command>DoApproveSubjectList</Command>

  <DataKeyList>3210002010402020170508000004,3210002010402020170228000002</DataKeyList>

  <ApprovalResult>2</ApprovalResult>

  <OperateFunctionNo>204020</OperateFunctionNo>

</CrudData>