XML to SQL table (epcis:EPCISDocument) - sql

Question

Could you help me here, please? I need to do a query with an XML file, however, it has something different because it has the epcis: at the beginning of the XML document.
So, if I try to do the query with epcis: and dts: the result is:
Msg 2229, Level 16, State 1, Line 38.
XQuery [nodes()]: The name "epcis" does not denote a namespace.
And if I try to do the query without epcis: and dts:, the result is in blank.
BEGIN
DECLARE #archivo XML
SET #archivo = (
'<?xml version="1.0" encoding="utf-8"?>
<epcis:EPCISDocument xmlns:dts="urn:dts:extension:xsd" schemaVersion="1.2" creationDate="2021-06-30T07:29:32.6511940Z"
xmlns:epcis="urn:epcglobal:epcis:xsd:1">
<EPCISBody>
<EventList>
<ObjectEvent>
<eventTime>2021-06-30T07:29:32</eventTime>
<eventTimeZoneOffset>+02:00</eventTimeZoneOffset>
<action>OBSERVE</action>
<bizStep>code</bizStep>
<dts:epcItemList>
<item>
<epc>123456789</epc>
<code>123456789zz</code>
</item>
<item>
<epc>9687654321</epc>
<code>9687654321zz</code>
</item>
<item>
<epc>147258369</epc>
<code>147258369zz</code>
</item>
</dts:epcItemList>
</ObjectEvent>
</EventList>
</EPCISBody>
</epcis:EPCISDocument>'
)
SELECT
patch.r.value('(epc)[1]', 'varchar(100)') as [epc],
patch.r.value('(code)[1]', 'varchar(100)') as [code]
FROM
#archivo.nodes('EPCISDocument/EPCISBody/EventList/ObjectEvent/epcItemList/item') AS patch(r)
END
GO
I need to export the information as a SQL table per item, like this:
| epc | code |
| -------- | ------------ |
| 123456789 | 123456789zz |
| 9687654321 | 9687654321zz |
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Thank you so much
Juan

Answer 1

You need to declare your namespaces. The namespace aliases present in the XML are not relevant, you can use any alias you like (that's the bit after AS in the declaration).
Also, text() is more performant when used in .value
WITH XMLNAMESPACES (
'urn:epcglobal:epcis:xsd:1' AS epcis,
'urn:dts:extension:xsd' AS dts
)
SELECT
patch.r.value('(epc/text())[1]', 'varchar(100)') as [epc],
patch.r.value('(code/text())[1]', 'varchar(100)') as [code]
FROM #archivo.nodes('epcis:EPCISDocument/EPCISBody/EventList/ObjectEvent/dts:epcItemList/item') as patch(r);
SQL Fiddle