在 XML 中查找重复项并将其与相关信息一起返回

Question

以下查询returns具有给定订单号的所有订单。我如何重写它以便返回指定的重复订单 ID 及其各自的 custid and/or 公司名称？

DECLARE @x AS XML;
SET @x = N'
<CustomersOrders>
  <Customer custid="1">
     <companyname>Customer NABCD</companyname>
       <Order orderid="10692">
         <orderdate>2013-11-03</orderdate>
       </Order>
        <Order orderid="10702">
          <orderdate>2007-10-13</orderdate>
        </Order>
        <Order orderid="10693">
          <orderdate>2008-03-16</orderdate>
        </Order>
      </Customer>
      <Customer custid="2">
        <companyname>Customer HMKLI</companyname>
        <Order orderid="10308">
          <orderdate>2006-09-18</orderdate>
        </Order>
        <Order orderid="10693">
          <orderdate>2008-03-04</orderdate>
        </Order>
  </Customer>
</CustomersOrders>';

SELECT @x.query('//Order[@orderid=10693]')

编辑：

输出格式可以是...

<CustomersOrders>
    <Customer custid="1">
         <companyname>Customer NABCD</companyname>
            <Order orderid="10693"/>
    </Customer>
    <Customer custid="2">
          <companyname>Customer HMKLI</companyname>
             <Order orderid="10693"/>
    </Customer>
</CustomersOrders>

或（更好）

  <CustomersOrders>
    <Order orderid="10693">
        <Customer custid="1">
             <companyname>Customer NABCD</companyname>
        </Customer>
        <Customer custid="2">
              <companyname>Customer HMKLI</companyname>
        </Customer>
    </Order>
  </CustomersOrders>'

Answer 1

这是一种可能的方式：

SELECT @x.query('
    <CustomersOrders>
    {
        for $order in //Order[@orderid=10693]
        let $customer := $order/..
        return 
            <Customer custid="{$customer/@custid}">
                {$customer/companyname}
                <Order orderid="{$order/@orderid}"/>
            </Customer>
    }
    </CustomersOrders>
')

输出：

<CustomersOrders>
  <Customer custid="1">
    <companyname>Customer NABCD</companyname>
    <Order orderid="10693" />
  </Customer>
  <Customer custid="2">
    <companyname>Customer HMKLI</companyname>
    <Order orderid="10693" />
  </Customer>
</CustomersOrders>

在 XML 中查找重复项并将其与相关信息一起返回

Finding duplicates and returning them with related information in XML

sql-server

xml

xquery-sql