[BTS] Use TSQL to query a XML field in SQLServer

When deploy BizTalk application. I often save XML message to database. 

 

When display some field in XML, I need following SQL to query XML field. 

 

 

starttime,
select 

 

convert(xml,RequestXML).value( ' (//GENERALDATA/SERIAL_NO)[1] ', ' varchar(30) ') SERIAL_NO
from BizTalkTask
where interfaceid = 10001
order  by id  desc


select 
starttime,
convert(xml,RequestXML).query( ' //GENERALDATA/SERIAL_NO ') XmlNode
from BizTalkTask
where interfaceid = 10001
order  by id  desc

  

An anther sample:

SELECT x.requestpayload.value('declare namespace s="http://blah.ca/api"; (/s:validate-student-request/s:student-id)[1]', 'int') as studentidFROM xoutput x

 <XmlColumn>.value('...namespace....; (...xPath...)[1]', 'Type') as ColumnAlias

 

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