[英]How to get data from XML column in SQL Server?
我在 SQL 服務器數據庫中有一個XML
列。 我想從該列中獲得結果。 這是 XML 列的樣子:
<ArrayOfTarget xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/TriTech.InformRMS.Domain.Core.ComplexTypes">
<Target>
<AgencyId i:nil="true" />
<AgencyName i:nil="true" />
<Id i:nil="true" />
<Name>Quick Search</Name>
<Type>Search</Type>
</Target>
<Target>
<AgencyId i:nil="true" />
<AgencyName i:nil="true" />
<Id i:nil="true" />
<Name>Quick Search = wbinc2000125</Name>
<Type>Quick Search</Type>
</Target>
<Target>
<AgencyId i:nil="true" />
<AgencyName i:nil="true" />
<Id i:nil="true" />
<Name>Results (0)</Name>
<Type>Result</Type>
</Target>
</ArrayOfTarget>
以下是我嘗試過但沒有結果的一些事情:
select
[XML].value ('(ArrayofTarget/Target/Name/node())[1]', 'nvarchar(max)') as Results
from
[DB].[dbo].[Table]
另一個例子:
;WITH XMLNAMESPACES (N'http://www.w3.org/2001/XMLSchema-instance' as X)
SELECT
[XML].value('(/X:ArrayOfTarget/X:Target/X:Name[1]', 'nvarchar(max)') as Name
FROM [DB].[dbo].[Table]
這是一個工作示例。
它展示了如何正確處理默認名稱空間以及如何使用兩個 XQuery 方法: .nodes()
和.value()
SQL
-- DDL and sample data population, start
DECLARE @tbl TABLE (ID INT IDENTITY PRIMARY KEY, xmldata XML);
INSERT INTO @tbl (xmldata) VALUES
(N'<ArrayOfTarget xmlns:i="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://schemas.datacontract.org/2004/07/TriTech.InformRMS.Domain.Core.ComplexTypes">
<Target>
<AgencyId i:nil="true"/>
<AgencyName i:nil="true"/>
<Id i:nil="true"/>
<Name>Quick Search</Name>
<Type>Search</Type>
</Target>
<Target>
<AgencyId i:nil="true"/>
<AgencyName i:nil="true"/>
<Id i:nil="true"/>
<Name>Quick Search = wbinc2000125</Name>
<Type>Quick Search</Type>
</Target>
<Target>
<AgencyId i:nil="true"/>
<AgencyName i:nil="true"/>
<Id i:nil="true"/>
<Name>Results (0)</Name>
<Type>Result</Type>
</Target>
</ArrayOfTarget>');
-- DDL and sample data population, end
;WITH XMLNAMESPACES (DEFAULT 'http://schemas.datacontract.org/2004/07/TriTech.InformRMS.Domain.Core.ComplexTypes')
SELECT c.value('(Name/text())[1]', 'VARCHAR(30)') AS [Name]
, c.value('(Type/text())[1]', 'VARCHAR(30)') AS [Type]
FROM @tbl CROSS APPLY xmldata.nodes('/ArrayOfTarget/Target') AS t(c);
Output
+-----------------------------+--------------+
| Name | Type |
+-----------------------------+--------------+
| Quick Search | Search |
| Quick Search = wbinc2000125 | Quick Search |
| Results (0) | Result |
+-----------------------------+--------------+
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