Read XML data in SQL - sql

Question

I want to query data from XML. I have managed to retrive data from another set of XML data but this are a bit problematic.
Bellow you see the data and the query that does not retrive any data.
DECLARE #xml XML
SET #xml=N'<DocumentXML>
<LoadApplicationResult xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Reaktor.Applikator.DTO">
<Application>
<EmbeddedProductList>
<EmbeddedProduct>
<Flag>false</Flag>
<CustomData>
<root xmlns="">
<Guaranteer ChangeTime="2012-04-28T08:50:07.5706054+02:00" ChangedBy="sven" OldValue="">
<Text>4</Text>
</Guaranteer>
<PercentGuarantee ChangeTime="2012-04-28T08:50:07.5706054+02:00" ChangedBy="sven" OldValue="">
<Number>100</Number>
</PercentGuarantee>
</root>
</CustomData>
<DataChangeTime>2014-04-28T08:50:07.5706054+02:00</DataChangeTime>
<ID>12</ID>
<FinanceSeparately>false</FinanceSeparately>
<Guid>5349efcd-457c-4423-b4bb-a28f97dd5e64</Guid>
<PluginData i:nil="true" />
<PriceCalcTime>2014-04-28T08:50:09.2580946+02:00</PriceCalcTime>
<Data>
<root xmlns="">
<root TableId="192">
<Generic.TypeCode>abba</Generic.TypeCode>
</root>
</root>
</Data>
</EmbeddedProduct>
<EmbeddedProduct>
<Flag>false</Flag>
<CustomData i:nil="true" />
<DataChangeTime>1954-10-03T00:00:00</DataChangeTime>
<ID>30</ID>
<FinanceSeparately>false</FinanceSeparately>
<Guid>d587b9b4-94df-4d9b-ba0d-2fdc62823a17</Guid>
<PluginData i:nil="true" />
<PriceCalcTime>2014-04-28T08:49:55.8831802+02:00</PriceCalcTime>
<Data>
<root xmlns="">
<root TableId="013">
<EmbProd.CMSPrice>0</EmbProd.CMSPrice>
<EmbProd.MonthFee Operator="DBLMUL" Target="CUSTOM.EPTermFee.ADD" Source="XPATH://PaySeries[1]/TermLength" DFValue="200">200</EmbProd.MonthFee>
</root>
<root TableId="759" GroupText="210" GroupText0="210">
<Flag>ink</Flag>
<Generic.TypeCode>fil</Generic.TypeCode>
</root>
</root>
</Data>
</EmbeddedProduct>
<EmbeddedProduct>
<Flag>false</Flag>
<CustomData>
<root xmlns="" />
</CustomData>
<DataChangeTime>2012-04-26T14:41:26.4232222+02:00</DataChangeTime>
<ID>16</ID>
<FinanceSeparately>false</FinanceSeparately>
<Guid>c2e2343f-a5d6-43c8-aa18-c43419d20165</Guid>
<PluginData i:nil="true" />
<PriceCalcTime>2014-04-28T08:49:55.8831802+02:00</PriceCalcTime>
<Data>
<root xmlns="">
<root TableId="102">
<EmbProd.MonthFee Operator="DBLMUL" Target="CUSTOM.EPTermFee.ADD" Source="XPATH://PaySeries[1]/TermLength" DFValue="300">300</EmbProd.MonthFee>
<EP.GenericCost Target="COST">114</EP.GenericCost>
</root>
<root TableId="102" GroupText="11" GroupText0="7">
<EP.TermCount Target="DBLMUL">13</EP.TermCount>
</root>
<root TableId="102" GroupText="210" GroupText0="210">
<Generic.TypeCode>frodinge</Generic.TypeCode>
</root>
</root>
</Data>
</EmbeddedProduct>
</EmbeddedProductList>
</Application>
</LoadApplicationResult>
</DocumentXML>'
SELECT tab.col.value('(Flag)[1]', 'nvarchar(max)') AS Flag
,tab.col.value('(Data/root/EmbProd.MonthFee)[1]', 'nvarchar(max)') AS Value
,tab.col.value('(ID)[1]', 'nvarchar(max)') AS Product
FROM #xml.nodes('/DocumentXML//LoadApplicationResult/Application/EmbeddedProductList/EmbeddedProduct') AS Tab(col)
The expected output should look like this:
+-------+-------+---------+
| Flag | Value | Product |
+-------+-------+---------+
| false | | 12 |
| false | 200 | 30 |
| true | 300 | 16 |
+-------+-------+---------+

Answer 1

You need to specify namespace
WITH XMLNAMESPACES ( 'http://schemas.datacontract.org/2004/07/Reaktor.Applikator.DTO' as x)
SELECT tab.col.value('(x:Flag)[1]', 'nvarchar(max)') AS Flag
,tab.col.value('(x:Data/root/root/EmbProd.MonthFee)[1]', 'nvarchar(max)') AS Value
,tab.col.value('(x:ID)[1]', 'nvarchar(max)') AS Product
FROM #xml.nodes('DocumentXML/x:LoadApplicationResult/x:Application/x:EmbeddedProductList/x:EmbeddedProduct') AS Tab(col);