Sql server 在SQL Server中选择XML元素

我需要使用SQLServer2008解析一些XML。我想我已经接近我想要的了，但是我没有正确的语法（我相信）

我有以下资料：

DECLARE @doc XML
SET @doc = '<ROOT>          
    <InvoiceDetail>
        <OrderId>1000000</OrderId>
        <OrderTypeId>2</OrderTypeId>
        <Id>2000</Id>
        <InvoiceItems>
            <InvoiceItem>
                <LineId>1</LineId>
                <Cd>123456</Cd>
                <Description>Item 1</Description>
                <Quantity>1</Quantity>
                <UnitPrice>99.990000</UnitPrice>
            </InvoiceItem>
            <InvoiceItem>
                <LineId>2</LineId>
                <Cd>234567</Cd>
                <Description>Item 2</Description>
                <Quantity>1</Quantity>
                <UnitPrice>89.990000</UnitPrice>
            </InvoiceItem>
        </InvoiceItems>
    </InvoiceDetail>
    <InvoiceDetail>
        <OrderId>1200000</OrderId>
        <OrderTypeId>1</OrderTypeId>
        <Id>3000</Id>
        <InvoiceItems>
            <InvoiceItem>
                <LineId>1</LineId>
                <Cd>234567</Cd>
                <Description>Item 2</Description>
                <Quantity>1</Quantity>
                <UnitPrice>89.990000</UnitPrice>
            </InvoiceItem>
            <InvoiceItem>
                <LineId>2</LineId>
                <Cd>345678</Cd>
                <Description>Item 3</Description>
                <Quantity>1</Quantity>
                <UnitPrice>79.990000</UnitPrice>
            </InvoiceItem>
        </InvoiceItems>
    </InvoiceDetail>
</ROOT>'

SELECT 
      Invoices.Node.value('@OrderId', 'VARCHAR(10)') 'OrderID'
    , Invoices.Node.value('@Id', 'INT') 'InvoiceId'
    , Items.Cd.value('.', 'VARCHAR(14)') 'ItemId'
FROM 
    @doc.nodes('//InvoiceDetail') Invoices(Node)
    CROSS APPLY Invoices.Node.nodes('./InvoiceItems/InvoiceItem/Cd') Items(Cd)

1000000 2000    123456
1000000 2000    234567
1200000 3000    234567
1200000 3000    345678

我试图得到以下信息：

DECLARE @doc XML
SET @doc = '<ROOT>          
    <InvoiceDetail>
        <OrderId>1000000</OrderId>
        <OrderTypeId>2</OrderTypeId>
        <Id>2000</Id>
        <InvoiceItems>
            <InvoiceItem>
                <LineId>1</LineId>
                <Cd>123456</Cd>
                <Description>Item 1</Description>
                <Quantity>1</Quantity>
                <UnitPrice>99.990000</UnitPrice>
            </InvoiceItem>
            <InvoiceItem>
                <LineId>2</LineId>
                <Cd>234567</Cd>
                <Description>Item 2</Description>
                <Quantity>1</Quantity>
                <UnitPrice>89.990000</UnitPrice>
            </InvoiceItem>
        </InvoiceItems>
    </InvoiceDetail>
    <InvoiceDetail>
        <OrderId>1200000</OrderId>
        <OrderTypeId>1</OrderTypeId>
        <Id>3000</Id>
        <InvoiceItems>
            <InvoiceItem>
                <LineId>1</LineId>
                <Cd>234567</Cd>
                <Description>Item 2</Description>
                <Quantity>1</Quantity>
                <UnitPrice>89.990000</UnitPrice>
            </InvoiceItem>
            <InvoiceItem>
                <LineId>2</LineId>
                <Cd>345678</Cd>
                <Description>Item 3</Description>
                <Quantity>1</Quantity>
                <UnitPrice>79.990000</UnitPrice>
            </InvoiceItem>
        </InvoiceItems>
    </InvoiceDetail>
</ROOT>'

SELECT 
      Invoices.Node.value('@OrderId', 'VARCHAR(10)') 'OrderID'
    , Invoices.Node.value('@Id', 'INT') 'InvoiceId'
    , Items.Cd.value('.', 'VARCHAR(14)') 'ItemId'
FROM 
    @doc.nodes('//InvoiceDetail') Invoices(Node)
    CROSS APPLY Invoices.Node.nodes('./InvoiceItems/InvoiceItem/Cd') Items(Cd)

1000000 2000    123456
1000000 2000    234567
1200000 3000    234567
1200000 3000    345678

---

我做错了什么？

抓取元素的语法是：

SELECT Invoices.Node.value('(OrderId)[1]', 'VARCHAR(10)') 'OrderID'
    , Invoices.Node.value('(Id)[1]', 'INT') 'InvoiceId'
    , Items.Cd.value('.', 'VARCHAR(14)') 'ItemId'
FROM 
    @doc.nodes('//InvoiceDetail') Invoices(Node)
    CROSS APPLY Invoices.Node.nodes('./InvoiceItems/InvoiceItem/Cd') Items(Cd)

在没有显式括号的情况下，这似乎也适用：

Invoices.Node.value('OrderId[1]', 'VARCHAR(10)') 

---

@

语法用于属性，而不是XQuery中的元素。如果你有

<InvoiceDetail title="something">

---

下面是一篇关于使用

的好文章，以下SQL也可以很好地处理您的数据：

--  Iterate through each of the "ROOT\InvoiceDetail" records in our XML
SELECT 
    x.Rec.query('./OrderId').value('.', 'nvarchar(2000)') AS 'OrderID',
    x.Rec.query('./Id').value('.', 'nvarchar(2000)') AS 'ID',
    items.cd.query('./Cd').value('.', 'nvarchar(2000)') AS 'ItemID'
FROM @doc.nodes('/ROOT/InvoiceDetail') as x(Rec)
CROSS APPLY x.Rec.nodes('./InvoiceItems/InvoiceItem') Items(Cd)

这给了我们以下结果：

---

（尽管语法令人费解，不是吗！）

+1对于易于测试/再现的示例，感谢Adam提供的指导和外部链接。