sql - 如何使用存储过程选择 xml 元素属性？

Question

好的，我现在有这个存储过程的代码。

ALTER PROC [dbo].[Readxml]
@xmlparam XML
AS
BEGIN
SET NOCOUNT ON
DECLARE @CustomerXml AS XML
SET @CustomerXml = @xmlparam

INSERT INTO Custtable.dbo.SPCustomer
(
    CustomerId,
    CustomerName
)
SELECT 
    Customer.attribute.value('CustomerId[1]', 'nvarchar(255)') AS CustomerId,
    Customer.attribute.value('Name[1]', 'nvarchar(255)') AS CustomerName
FROM 
    @xmlparam.nodes('Customers/Customer') AS Customer(attribute)
END

我的 XML 看起来像这样（简化）。

<Customers>
  <Customer CustomerId="94" Name="name1" />
  <Customer CustomerId="95" Name="name2" />
  <Customer CustomerId="96" Name="name3" />
</Customers>

使用我的代码现在我无法获取属性值，据我所知，我正在尝试获取<Customer>标签内的元素，称为CustomerIdand Name，它们不存在。

从表中选择所有行时，在过程完成后，我得到所有行但具有 NULL 值。

我的问题是，如何从 XML 中获取属性？

提前致谢！

Answer 1

你需要这个：

SELECT 
    Customer.attribute.value('@CustomerId', 'nvarchar(255)') AS CustomerId,
    Customer.attribute.value('@Name', 'nvarchar(255)') AS CustomerName
FROM 
    @xmlparam.nodes('Customers/Customer') AS Customer(attribute)

要获取属性，请使用前导@

Answer 2

ALTER PROC [dbo].[Readxml]
@xmlparam XML
AS
BEGIN
SET NOCOUNT ON
DECLARE @CustomerXml AS XML
SET @CustomerXml = @xmlparam

INSERT INTO Custtable.dbo.SPCustomer
(
    CustomerId,
    CustomerName
)
SELECT Customer.attribute.value('@CustomerId', 'BIGINT') AS CustomerId,
    Customer.attribute.value('@Name', 'nvarchar(255)') AS CustomerName
FROM @xmlparam.nodes('Customers/Customer') AS Customer(attribute)

END