Wednesday, March 21, 2012

How do i getting many Rows from a single XML column?

using SQL 2005...

I have a table called training. It has 2 columns ID and data.
The ID column is a INT.
The data column is an XML data type that contains XML looking like the following:
<TrainingRequests>
<TrainingRequest>
<ProgramName>Learn SQL 2005<ProgramName>
<UrgencyLevel>3</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Walk<ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Eat<ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
</TrainingRequests>

if we asume that the table has 3 rows with the ID field being 1-3 and all the XML is the same as above.
I'm trying create an SQL statement that outputs the following results

idProgramNameUrgencyLevel
1Learn SQL 20053
1Learn To Walk1
1Learn To Eat1
2Learn SQL 20053
2Learn To Walk1
2Learn To Eat1
3Learn SQL 20053
3Learn To Walk1
3Learn To Eat1
 

please can some one help me?

You will need to use the nodes() to break your xml into multiple rows then CROSS APPLY to that. For example:

Dan

CREATE TABLE #t1(
id int,
data xml
)

INSERT INTO #t1 SELECT 1, '<TrainingRequests>
<TrainingRequest>
<ProgramName>Learn SQL 2005</ProgramName>
<UrgencyLevel>3</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Walk</ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Eat</ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
</TrainingRequests>'

INSERT INTO #t1 SELECT 2, '<TrainingRequests>
<TrainingRequest>
<ProgramName>Learn SQL 2005</ProgramName>
<UrgencyLevel>3</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Walk</ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Eat</ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
</TrainingRequests>'

INSERT INTO #t1 SELECT 2, '<TrainingRequests>
<TrainingRequest>
<ProgramName>Learn SQL 2005</ProgramName>
<UrgencyLevel>3</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Walk</ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
<TrainingRequest>
<ProgramName>Learn To Eat</ProgramName>
<UrgencyLevel>1</UrgencyLevel>
</TrainingRequest>
</TrainingRequests>'

SELECT ID, t.c.value('ProgramName[1]', 'NVARCHAR(MAX)') + ' ' + t.c.value('UrgencyLevel[1]', 'NVARCHAR(MAX)')
FROM #t1
CROSS APPLY
#t1.data.nodes('TrainingRequests/TrainingRequest') AS t(c)

|||Thank you, you saved me ripping out the rest of my hair!!!

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