Parse XML value with Name Space in SQl - sql

Question

I have following XML :
<ProductionSchedule xmlns:inp2="http://www.wbf.org/xml/B2MML-V0401" xmlns="http://www.wbf.org/xml/B2MML-V0401">
<inp2:ProductionRequest>
<inp2:ID>0916A</inp2:ID>
<inp2:Description>SUBH190916A</inp2:Description>
<inp2:Location>
<inp2:EquipmentID>MYEqupiment</inp2:EquipmentID>
</inp2:Location>
<inp2:SegmentRequirement>
<inp2:ID>000</inp2:ID>
<inp2:EarliestStartTime>2015-10-17T12:00:00</inp2:EarliestStartTime>
<inp2:LatestEndTime>2015-10-19T12:00:00</inp2:LatestEndTime>
<inp2:MaterialProducedRequirement>
<inp2:MaterialDefinitionID>GEEC3MA0025EMZI</inp2:MaterialDefinitionID>
<inp2:Quantity>
<inp2:QuantityString>2</inp2:QuantityString>
</inp2:Quantity>
<inp2:MaterialProducedRequirementProperty>
<inp2:ID>ERPWOStatus</inp2:ID>
<inp2:Value>
<inp2:ValueString>Released</inp2:ValueString>
</inp2:Value>
</inp2:MaterialProducedRequirementProperty>
<inp2:MaterialProducedRequirementProperty>
<inp2:ID>ROUTING</inp2:ID>
<inp2:Value>
<inp2:ValueString>SOmeMPRVaue</inp2:ValueString>
</inp2:Value>
</inp2:MaterialProducedRequirementProperty>
<inp2:MaterialProducedRequirementProperty>
<inp2:ID>MPValue2</inp2:ID>
<inp2:Value>
<inp2:ValueString>2016-01-21T12:00:00</inp2:ValueString>
</inp2:Value>
</inp2:MaterialProducedRequirementProperty>
</inp2:MaterialProducedRequirement>
</inp2:SegmentRequirement>
</inp2:ProductionRequest>
</ProductionSchedule>
I am trying to get the value MPValue2 , from the XML.
I tried with following:
Select `#xml.value('(/ProductionSchedule/inp2:ProductionRequest/inp2:SegmentRequirement/inp2:MaterialProducedRequirement/inp2:MaterialProducedRequirementProperty)[1]','nvarchar(255)')`

Answer 1

Your select is OK, but you must consider/declare the namespaces:
WITH XMLNAMESPACES(DEFAULT 'http://www.wbf.org/xml/B2MML-V0401'
,'http://www.wbf.org/xml/B2MML-V0401' AS inp2)
Select #xml.value('(/ProductionSchedule/inp2:ProductionRequest/inp2:SegmentRequirement/inp2:MaterialProducedRequirement/inp2:MaterialProducedRequirementProperty)[1]','nvarchar(255)')
This works too (wildcard) but it's better to be as specific as possible:
Select #xml.value('(/*:ProductionSchedule/*:ProductionRequest/*:SegmentRequirement/*:MaterialProducedRequirement/*:MaterialProducedRequirementProperty)[1]','nvarchar(255)')
The fast and lazy would work too :-) but not fast in terms of performance...
Select #xml.value('(//*:MaterialProducedRequirementProperty)[1]','nvarchar(255)')
UPDATE
This is the query to get all your Properties:
WITH XMLNAMESPACES(DEFAULT 'http://www.wbf.org/xml/B2MML-V0401'
,'http://www.wbf.org/xml/B2MML-V0401' AS inp2)
SELECT prop.value('(inp2:ID)[1]','nvarchar(100)') AS Property
FROM #xml.nodes('/ProductionSchedule/inp2:ProductionRequest/inp2:SegmentRequirement/inp2:MaterialProducedRequirement/inp2:MaterialProducedRequirementProperty') AS A(prop)
The result
Property
--------
ERPWOStatus
ROUTING
MPValue2
UPDATE 2: Use the ID as filter in XQuery
See how I added the filter at the end of the XPath in .nodes().
Nodes will return all sub-elements row-wise. The filter will reduce the resultset to one single row (if inp2:ID is unique!) and then read the Value/ValueString.
I let the namespace declaration for DEFAULT and inp2. But, as #Serf pointed out correctly, both URLs are equal. It would be enough to declare only the DEFAULT and query without any namespace-prefixes...
DECLARE #TheID NVARCHAR(100)='MPValue2';
WITH XMLNAMESPACES(DEFAULT 'http://www.wbf.org/xml/B2MML-V0401'
,'http://www.wbf.org/xml/B2MML-V0401' AS inp2)
SELECT prop.value('(inp2:Value/inp2:ValueString)[1]','nvarchar(100)') AS Property
FROM #xml.nodes('/ProductionSchedule/inp2:ProductionRequest/inp2:SegmentRequirement/inp2:MaterialProducedRequirement/inp2:MaterialProducedRequirementProperty[inp2:ID=sql:variable("#TheID")]') AS A(prop)