Extract XML nodes using OPENXML - sql

Question

sample_xml I tried to extract XML data using OPENXML in SQL, but the XML file contain prefixes such as: "pidx:CustomerID>01234", see sample_xml.
If I exclude the prefix "pidx:" it can't read data, if I include, error out:
Msg 6603, Level 16, State 2, Line 15 XML parsing error: Reference to
undeclared namespace prefix: 'pidx'.
How do I do it?

Answer 1

Besides the fact, that you should never post your code / XML as a picture, there are some general hints:
Your prefixes are binding an element to a namespace.
This namespace must be declared!
If your xml (as posted in the picture) is complete, it is invalid! If it is just a portion of a bigger XML you'll find the namespace's declaration somewhere above, in most cases in the root element
OPENXML is outdated and should not be used any more. Better use the XML's native methods like .value or .nodes().
update
As requested in a comment some explanation about the need to declare a namespace. This XML is not valid:
<abc:test>1</abc:test>
Try this:
DECLARE #xml XML=N'<abc:test>1</abc:test>';
You'll get this
Msg 9459, Level 16, State 1, Line 1 XML parsing: line 1, character 10,
undeclared prefix
Now declare the namespace and it works
DECLARE #xml XML=N'<abc:test xmlns:abc="blah">1</abc:test>';
Such a namespace is valid for the declaring node and all elements hierarchically below (=within).
In most cases namespaces are declared within a root node
Try this
DECLARE #xml XML=
N'
<root xmlns:abc="blah">
<abc:test>1</abc:test>
</root>
';
SELECT #xml