--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>