Query to XML Node is giving me NULL Value - sql

Question

Trying to achieve what stored procedure used for each report in Report Server.
INSERT INTO #ReportRawXML
SELECT
ItemID, RPT.[Name] AS ReportName,
CONVERT(XML, CONVERT(VARBINARY(MAX), RPT.Content)) AS XMLdata
FROM
ReportServer.dbo.[Catalog] AS RPT
WHERE
RPT.[Name] LIKE '%catalog%'
XML sample:
<Report>
<DataSets>
<DataSet Name="DSET_ReportRepository">
<Query>
<DataSourceName>CCA_PROD</DataSourceName>
</Query>
</DataSets>
</Report>
I have a table with a XML column which I want to query, but I'm getting NULL back; I tried all possible ways, please someone advice.
SELECT
b.ItemID, b.ReportName,
n.c.value('#DataSourceName', 'VARCHAR(MAX)') AS id,
n.c.value('/DataSourceName[1]', 'VARCHAR(500)') AS DataSourceName,
n.c.value('/CommandType[1]', 'VARCHAR(100)') AS CommandType,
n.c.value('/CommandText[1]', 'VARCHAR(100)') AS CommandText
FROM
#ReportRawXML b
OUTER APPLY
b.XMLdata.nodes('/Report/DataSets/DataSet/Query') AS n(c)
Question: getting NULL in column 3 above

Answer 1

Some hints for your next question:
Please try to add a MCVE (a stand-alone-sample as I provide it here for you) right from the start. You know all your details, but we don't...
Try to add a sample, where the sample includes everything (e.g. your sample does not show any CommandType or CommandText
Please read about the internal formatting tools on SO how to add code, normal text, how to highlight or cite...
Please run your sample yourself. Doing so, you would have found, that the XML provided is not well-formed (missing </DataSet>).
But now to your question:
DECLARE #mockupTable TABLE(ID INT IDENTITY, XMLdata XML);
INSERT INTO #mockupTable VALUES
(N'<Report>
<DataSets>
<DataSet Name="DSET_ReportRepository">
<Query>
<DataSourceName>CCA_PROD</DataSourceName>
</Query>
</DataSet>
</DataSets>
</Report>');
--The query
SELECT b.ID
,ds.value('(Query/DataSourceName/text())[1]', 'varchar(max)') as id
,ds.value('#Name', 'varchar(max)') as id
FROM #mockupTable b
OUTER APPLY b.XMLdata.nodes('/Report/DataSets/DataSet') as n(ds);
Reading from XML you must know, that the # before the name indicates an attribute. To read the DataSet's Name attribute, you need this, but not before DataSourceName as in your own attempt.