SQL 到 XML 格式化

Question

我正在尝试为 SQL 查询连接三个表以输出为 XML 以下是我的查询：

select 
    invoices.order_no as "order",
    customerinfo.name as BillingCompanyName,
    line.item_code, 
    line.item_qty
from 
    invoices
inner join 
    customerinfo on customerinfo.cust_code = invoices.cust_code
inner join 
    line on line.order_no = invoices.order_no
where 
    invoices.custlog10 = 'f' and invoices.order_no = '332504'
for xml auto, type, elements

这是生成的输出

<invoices>
  <order>332504</order>
  <customerinfo>
    <BillingCompanyName>Two Bear Farm</BillingCompanyName>
    <line>
      <item_code>2909-B</item_code>
      <item_qty>2.000000</item_qty>
    </line>
    <line>
      <item_code>SH-DISC</item_code>
      <item_qty>1.000000</item_qty>
    </line>
  </customerinfo>
</invoices>

此输出大部分是正确的，我只是将其移动到 customerinfo 标记结束的位置，如下所示，以粗体显示：

<invoices>
  <order>332504</order>
  <customerinfo>
    <BillingCompanyName>Two Bear Farm</BillingCompanyName>
  </customerinfo>
  <line>
      <item_code>2909-B</item_code>
      <item_qty>2.000000</item_qty>
  </line>
  <line>
      <item_code>SH-DISC</item_code>
      <item_qty>1.000000</item_qty>
  </line>
</invoices>

此代码旨在提供给第三方模块以读取销售订单。

我是 SQL 输出为 XML 的新手，任何解决此格式问题的帮助都会很棒！

Answer 1

一种方法是通过具有显式路径的相关查询，因为您可以更好地控制格式：

select 
    invoices.order_no as "order",

    (select customerinfo.name as 'BillingCompanyName'
     from customerinfo where 
     customerinfo.cust_code=invoices.cust_code
    for xml path('customerinfo'), type, elements
    ),

    (select line.item_code, line.item_qty
     from line where line.order_no = invoices.order_no
     for xml path('line'), type, elements)
from 
    invoices
where 
    invoices.custlog10 = 'f' and invoices.order_no = '332504'
for xml path('invoices')

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