Oracle 10g: Extract data (select) from XML (CLOB Type)

Question

I\'m new in Oracle and I\'ve - maybe trivial - a problem in a select. (I\'m using Oracle 10g Express Edition).

I\'ve a DB with a field CLOB: mytab.xml This column have a

Answer 1

In case of :

<?xml version="1.0" encoding="iso-8859-1"?>
<info xmlns="http://namespaces.default" xmlns:ns2="http://namespaces.ns2" >
    <id> 954 </id>
    <idboss> 954 </idboss>
    <name> Fausto </name>
    <sorname> Anonimo </sorname>
    <phone> 040000000 </phone>
    <fax> 040000001 </fax>
</info>

Query :

Select *
from xmltable(xmlnamespaces(default 'http://namespaces.default'
                              'http://namespaces.ns2' as "ns",
                       ), 
                '/info'
                passing xmltype.createxml(xml) 
                columns id varchar2(10) path '/id',
                        idboss varchar2(500) path '/idboss',
                        etc....

                ) nice_xml_table

Answer 2

Try using xmltype.createxml(xml).

As in,

select extract(xmltype.createxml(xml), '//fax').getStringVal() from mytab;

It worked for me.

If you want to improve or manipulate even further.

Try something like this.

Select *
from xmltable(xmlnamespaces('some-name-space' as "ns", 
                                  'another-name-space' as "ns1",
                           ), 
                    '/ns/ns1/foo/bar'
                    passing xmltype.createxml(xml) 
                    columns id varchar2(10) path '//ns//ns1/id',
                            idboss varchar2(500) path '//ns0//ns1/idboss',
                            etc....

                    ) nice_xml_table

Hope it helps someone.

Answer 3

In case the XML store in the CLOB field in the database table. E.g for this XML:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Awmds>
    <General_segment>
        <General_segment_id>
        <Customs_office_code>000</Customs_office_code>
    </General_segment_id>
</General_segment>
</Awmds>

This is the Extract Query:

SELECT EXTRACTVALUE (
    xmltype (T.CLOB_COLUMN_NAME),
    '/Awmds/General_segment/General_segment_id/Customs_office_code')
    AS Customs_office_code
FROM TABLE_NAME t;

Answer 4

this query runs perfectly in my case

select xmltype(t.axi_content).extract('//Lexis-NexisFlag/text()').getStringVal() from ax_bib_entity t

Answer 5

Try this instead:

select xmltype(t.xml).extract('//fax/text()').getStringVal() from mytab t

Answer 6

You can achieve with below queries

1. select extract(xmltype(xml), '//fax/text()').getStringVal() from mytab;

2. select extractvalue(xmltype(xml), '//fax') from mytab;