[英]SQL Server - XQuery for XML
Just similar other post, I need to retrieve any rows from table applying criteria on Xml column, for instance, supposing you have an xml column like this: 就像其他类似的帖子一样,我需要从Xml列上的表应用条件中检索任何行,例如,假设你有一个像这样的xml列:
<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>One</d2p1:Key>
<d2p1:Value>1</d2p1:Value>
</d2p1:KeyValueOfstringstring>
<d2p1:KeyValueOfstringstring>
<d2p1:Key>Two</d2p1:Key>
<d2p1:Value>2</d2p1:Value>
</d2p1:KeyValueOfstringstring>
</AllData>
</DynamicProfile>
My query would be able to return all rows where node value <d2p1:Key> = 'some key value'
AND node value <d2p1Value = 'some value value'
. 我的查询将能够返回节点值<d2p1:Key> = 'some key value'
和节点值<d2p1Value = 'some value value'
。
Imagine of that just as a dynamic table where KEY node represent the column name and Value node represent column's value. 想象一下,就像动态表一样,KEY节点表示列名,Value节点表示列的值。
The following query does not work because key and value nodes are not sequential: 以下查询不起作用,因为键和值节点不是顺序的:
select * from MyTable where
MyXmlField.exist('//d2p1:Key[.="One"]') = 1
AND MyXmlField.exist('//d2p1:Value[.="1"]') = 1
而不是查找//d2p1:key[.="One"]
和//d2p1:Value[.="1"]
作为两个单独的搜索,执行一次查找两个查询的查询,如下所示:
//d2p1:KeyValueOfstringstring[./d2p1:Key="One"][./d2p1:Value=1]
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