Trying to query XML Data - node has a space in it - sql-server

Question

I am trying to learn how to work with xml files and data in SQL Server and I'm trying to query an xml file but nothing is returned.
Here is the xml data:
<?xml version="1.0" encoding="UTF-8"?>
<Report xmlns="AdmissionsByPCP" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Name="AdmissionsByPCP" xsi:schemaLocation="AdmissionsByPCP http://10.xxx.x.xx/ReportServer_NameofReportServer?%2FHl%20C%20Syst%20Reports%2health%2FAdmissBy&rs%3ACommand=Render&rs%3AFormat=XML&rs%3ASessionID=h0iz5ijxgt2vdl45g3pjfs45&rc%3ASchema=True">
<Tablix2>
<Details_Collection>
<Details PCPCarrier="DoctorsName">
<Subreport1>
<Report Name="PCPAdmitSubReport">
<Tablix5 Textbox5="79">
<Details_Collection>
<Details Textbox37="Discharge Dx Code: ICDCode" Textbox89="Admit Dx Code: ICDCode" LOS="4" DischargeDate="07/10/2017" AdmitDate="07/06/2017" Hospital="Hospital Name" MemberName="Name" DOB="1/1/2019" AdmissionType="Inpatient" MemberNo="12345" Auth="321*I" Status="Close" AdmissionID="00001" LobName="Medicare" CarrierName="CarrierName"/>
</Details></Details_Collection></Tablix5></Report></Subreport1></Details></Details_Collection></Tablix2></Report>
Here is the query I'm using:
Declare #XMLData as XML
Set #XMLData=(
Select bulkcolumn
FROM OPENROWSET (Bulk '\Directory\AdmissionsByPCP.xml',
Single_Blob) a)
Select
#XMLData.value('(/Root/Report/Tablix2/Detail_Collections/DetailsPCPCarrier) [1]', 'varchar(max)') PCP
The query returns null and I don't know why. Is it because there is a space in the node (<Details PCPCarrier>) and if so how do I work around that?

Answer 1

You have misunderstood how XML works. This is the node you are looking for:
<Details PCPCarrier="DoctorsName">
This is not a node called Details PCPCarrier; it is a node called Details with an attribute called PCPCarrier.
So the XPath to select it would be:
/Root/Report/Tablix2/Detail_Collections/Details
Or, if you want to specifically filter by the PCPCarrier attribute existing:
/Root/Report/Tablix2/Detail_Collections/Details[#PCPCarrier]
Or, to get the value of the attribute itself:
/Root/Report/Tablix2/Detail_Collections/Details/#PCPCarrier

Answer 2

IMSoP pointed me in the right direction and I figured out the rest myself.
I also needed to add this:
With XMLNAMESPACES (Default 'AdmissionsByPCP')
So the query looks like this:
Declare #XMLData as XML
Set #XMLData=(
Select *
FROM OPENROWSET (Bulk '\\Directory\AdmissionsByPCP.xml',
Single_Clob) a );
With XMLNAMESPACES (Default 'AdmissionsByPCP')
Select
#XMLData.value('(/Report/Tablix2/Details_Collection/Details/#PCPCarrier)
[1]', 'varchar(max)')