XML字段 - 查詢

我無法構建正確的syntaxt，以便在我的sql服務器2008上執行與XML字段相關的任何查詢。XML字段 - 查詢

我有一個簡單的表，如Idproduct，ProductName和XmlProduct。 ..和XMLPRODUCT場看起來像以下：

<DynamicProfile xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/WinTest"> 
    <AllData xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays"> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MyFirstValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> 
    </AllData> 
</DynamicProfile>

舉例來說，我需要編寫一個查詢其抽取包含節點的值改爲「MySecondKey」的所有行。如何才能做到這一點？

來源

2012-05-09 bit

您可以使用下面的代碼TSQL - >

declare @xmldata xml 
    set @xmldata = 
    '<DynamicProfile xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/WinTest"> 
    <AllData xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays"> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MyFirstValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> </AllData> 
</DynamicProfile>' 

DECLARE @hDoc int, @rootxmlns varchar(100) 
SET @rootxmlns = '<AllData xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" />' 

EXEC sp_xml_preparedocument @hDoc OUTPUT, @xmldata, @rootxmlns 

SELECT * 
FROM OPENXML(@hDoc, '//d2p1:KeyValueOfstringstring',2) 
WITH ([d2p1:Key] varchar(100) , [d2p1:Value] varchar(100)) where [d2p1:Key] = 'MySecondKey' 

--clean up 
EXEC sp_xml_removedocument @hDoc

來源

2012-05-09 10:18:50 rt2800

爲什麼我需要聲明@xmldata變量？這已經存在於我的表xml字段中。另外，有沒有使用XQuery的解決方案？像查詢，價值，存在的方法..？ – bit

與xquery類似的解決方案在這裏推薦 - > http://stackoverflow.com/questions/1440848/openxml-with-xmlnsdt – rt2800

請你能給我發一個與我的問題有關的明確例子嗎？ – bit

下面是使用XQuery運營商俺們 - >

declare @xmldata xml 
    set @xmldata = 
    '<DynamicProfile xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/WinTest"> 
    <AllData xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays"> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MyFirstValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> 
    <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MySecondKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> <d2p1:KeyValueOfstringstring> 
     <d2p1:Key>MyFirstKey</d2p1:Key> 
     <d2p1:Value>MySecondValue</d2p1:Value> 
    </d2p1:KeyValueOfstringstring> </AllData> 
</DynamicProfile>' 

;WITH XMLNAMESPACES 
(
    DEFAULT 'http://schemas.datacontract.org/2004/07/WinTest', 
    'http://schemas.microsoft.com/2003/10/Serialization/Arrays' as d2p1 
) 
SELECT x.c.value('(d2p1:Key)[1]', 'varchar(100)') as key3, x.c.value('(d2p1:Value)[1]', 'varchar(100)') as value 
FROM @xmldata.nodes('/DynamicProfile/AllData/d2p1:KeyValueOfstringstring') x(c) where x.c.value('(d2p1:Key)[1]', 'varchar(100)') = 'MySecondKey'

來源

2012-05-09 10:59:06 rt2800

那麼，但在我的情況下，@ xmldata變量是一個表字段。所以，考慮你想執行一個查詢來提取所有與xml匹配的行，在那裏clausole，我該怎麼做？ – bit

請查看本文 - > http://www.databasejournal.com/features/mssql/article.php/3674311/Query-XML-data-from-a-table-with-XML-data-type.htm – rt2800

什麼都不是去做。對我來說，「翻譯」xml字段並不重要，相反，我只能檢索受我的where條件影響的所有行。哪裏condifition指的是xml字段，但最終我想實現的是「本地」行，例如：Select * from MyTable WHERE XmlField.Value（key）='some value' – bit

XML字段 - 查詢

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