将XML导入SQL Server

Question

我可以找到很多关于如何将某些类型的XML数据导入SQL Server 2005的示例.但是我已经获得了以下格式的数据(用ID代替"row"和"cell"而不是命名的标签等:

<?xml version="1.0"?> <rows>
    <row id='1'>
        <cell id='category'>Simple</cell>
        <cell id='query'>summary</cell>
        <cell id='clientsfound'>6</cell>
        <cell id='eligibleclients'>11</cell>
        <cell id='percentage'>55</cell>
        <cell id='days'>0</cell>
    </row>

    <row id='2'>
        <cell id='category'>Complex</cell>
        <cell id='query'>details</cell>
        <cell id='clientsfound'>4</cell>
        <cell id='eligibleclients'>6</cell>
        <cell id='percentage'>67</cell>
        <cell id='days'>5</cell>
    </row>

    ...
     </rows>

理想情况下,我想将其加载到表中,例如:

CREATE TABLE [dbo].[QueryResults](
    [UserString] [varchar](50) NULL,
    [ImportStamp] [timestamp] NULL,
    [RowID] [int] NULL,
    [Category] [nchar](10) NULL,
    [Query] [nchar](10) NULL,
    [ClientsFound] [int] NULL,
    [EligibleClients] [int] NULL,
    [Percentage] [int] NULL,
    [Days] [int] NULL
)

有人能为我提供一个示例或指向在线教程吗？

Answer 1

xml应该是""不是'内部,不是？

无论如何,您可以本机解析XML数据类型.由于内存使用量的开销,sp_xml_preparedocument非常危险.

DECLARE @foo XML;

SET @foo = N'<?xml version="1.0"?>
<rows>
    <row id="1">
        <cell id="category">Simple</cell>
        <cell id="query">summary</cell>
        <cell id="clientsfound">6</cell>
        <cell id="eligibleclients">11</cell>
        <cell id="percentage">55</cell>
        <cell id="days">0</cell>
    </row>
    <row id="2">
        <cell id="category">Complex</cell>
        <cell id="query">details</cell>
        <cell id="clientsfound">4</cell>
        <cell id="eligibleclients">6</cell>
        <cell id="percentage">67</cell>
        <cell id="days">5</cell>
    </row>
</rows>';

SELECT
    x.item.value('@id', 'int') AS RowID,
    y.item.value('(./cell[@id="category"])[1]', 'nchar(10)') AS category,
    y.item.value('(./cell[@id="query"])[1]', 'nchar(10)') AS query,
    y.item.value('(./cell[@id="clientsfound"])[1]', 'int') AS clientsfound,
    y.item.value('(./cell[@id="eligibleclients"])[1]', 'int') AS eligibleclients,
    y.item.value('(./cell[@id="percentage"])[1]', 'int') AS percentage,
    y.item.value('(./cell[@id="days"])[1]', 'int') AS days
FROM
    @foo.nodes('/rows/row') x(item)
    CROSS APPLY
    x.item.nodes('.') AS y(item)

Answer 2

您可以使用 OPENXML 和 XQUERY 来完成此操作。

DECLARE @XMLdoc XML
DECLARE @idoc int
SELECT @XMLdoc = '<?xml version="1.0"?>
  <rows>
    <row id="1">
        <cell id="category">Simple</cell>
        <cell id="query">summary</cell>
        <cell id="clientsfound">6</cell>
        <cell id="eligibleclients">11</cell>
        <cell id="percentage">55</cell>
        <cell id="days">0</cell>
    </row>
    <row id="2">
        <cell id="category">Complex</cell>
        <cell id="query">details</cell>
        <cell id="clientsfound">4</cell>
        <cell id="eligibleclients">6</cell>
        <cell id="percentage">67</cell>
        <cell id="days">5</cell>
    </row>
  </rows>'


-- Create an internal representation of the XML document.
EXEC sp_xml_preparedocument @idoc OUTPUT, @XMLDoc

INSERT INTO QueryResults (RowID,Category,Query,ClientsFound,EligibleClients,Percentage,Days)
SELECT  id,
        overflow.value('(/row/cell[@id="category"])[1]', 'nchar(10)'),
        overflow.value('(/row/cell[@id="query"])[1]', 'nchar(10)'),
        overflow.value('(/row/cell[@id="clientsfound"])[1]', 'int'),
        overflow.value('(/row/cell[@id="eligibleclients"])[1]', 'int'),
        overflow.value('(/row/cell[@id="percentage"])[1]', 'int'),
        overflow.value('(/row/cell[@id="days"])[1]', 'int')
FROM OPENXML (@idoc, '/rows/row',10)
WITH (id int '@id',
    overflow xml '@mp:xmltext' --the row xml node
)

-- Release resources allocated for the XML document.
EXEC sp_xml_removedocument @idoc

SELECT * FROM QueryResults

结果：

UserString  ImportStamp        RowID  Category  Query    ClientsFound EligibleClients Percentage  Days
----------- ------------------ ------ --------- -------- ------------ --------------- ----------- ----
NULL        0x000000000000C1CA 1      Simple    summary  6            11              55          0
NULL        0x000000000000C1CB 2      Complex   details  4            6               67          5

我不确定您想要在“UserString”中填充什么，但您可以稍后再解决。

希望这能为您的问题提供合适的解决方案。

-- 抱歉 gbn，您对 sp_xml_preparedocument 的看法可能是正确的。我只是从我们与 Microsoft SDC 团队合作的项目中的一些类似存储过程中采用了这种方法，因此认为它是安全的。无论如何，你的方法可能更干净。