How to extract attribute value from an XML

I have column where all my diffrent structures of XML's are getting stored. I want extract a patticular attribute value from all the XML’s. Can any one help me with this?
Thanks,
swagath

Kindly refer to the EXTRACTVALUE function in your online documentation and refrain from further doc questions.
Sybrand Bakker
Senior Oracle DBA

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Attachments:
EX1.jpg ‏36 KB

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Thanks,
Christophe S.
FSE East of France І Certified LabVIEW Associate Developer І National Instruments France

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Hi all,
I'm just trying to introduce to XMLType and see the potencialities of that.
DB version:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
PL/SQL Release 10.2.0.5.0 - Production
CORE     10.2.0.5.0     Production
TNS for IBM/AIX RISC System/6000: Version 10.2.0.5.0 - Productio
NLSRTL Version 10.2.0.5.0 - Production
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XMLTYPE doc STORE AS CLOB;
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<?xml version="1.0" encoding="UTF-8" ?>
- <ReceiptDesc>
<appt_nbr>2142473</appt_nbr>
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<document_type>P</document_type>
<asn_nbr />
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<item_id>509720</item_id>
<unit_qty>83.0000</unit_qty>
<receipt_xactn_type>R</receipt_xactn_type>
+ <receipt_date>
<year>2012</year>
<month>09</month>
<day>17</day>
<hour>15</hour>
<minute>33</minute>
<second>49</second>
</receipt_date>
<receipt_nbr>6902340</receipt_nbr>
<container_id>1</container_id>
<to_disposition>ATS</to_disposition>
<user_id>NTCPO01</user_id>
<catch_weight />
</ReceiptDtl>
- <ReceiptDtl>
<item_id>509740</item_id>
<unit_qty>17.0000</unit_qty>
<receipt_xactn_type>R</receipt_xactn_type>
+ <receipt_date>
<year>2012</year>
<month>09</month>
<day>17</day>
<hour>15</hour>
<minute>33</minute>
<second>49</second>
</receipt_date>
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<to_disposition>ATS</to_disposition>
<user_id>NTCPO01</user_id>
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</Receipt>
</ReceiptDesc>
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SELECT EXTRACTVALUE(doc, '/ReceiptDesc/Receipt/dc_dest_id') FROM asm_test; ---- got the correct value 401
select count(*) from asm_jam_test d where (d.doc.getClobVal()) like '%NTCPO01%'; -- got 1
But i need to find a Specific data from XML (the main goal is to update a value inside XML).
If i try this:
select extract(doc, '/ReceiptDesc/Receipt/ReceiptDtl/item_id/text()').getstringVal() from asm_test
where existsNode(doc,'/ReceiptDesc/Receipt/ReceiptDtl/receipt_nbr') = 1;
got: 509720509740 -- which are the concatenate of 2 Item_ids
when i try to find out the Item_id of specific receipt_nbr i got a NULL response.
select extract(doc, '/ReceiptDesc/Receipt/ReceiptDtl/item_id/text()').getstringVal()
from asm_test
where existsNode(doc,'/ReceiptDesc/Receipt/ReceiptDtl/receipt_nbr') = 1 and
extract(doc,'/ReceiptDesc/Receipt/ReceiptDtl/receipt_nbr/text()').getstringVal() = '6902340';
What i'm doing wrong or which is the best way to get data from XML?
Many thanks in advance

Hi,
Thanks for providing db version and sample data in the first place.
Don't forget to use the {code} tags to preserve formatting.
Also, when posting XML, do not copy/paste directly from your browser as it retains +/- signs and therefore needs extra processing on our side.
select count(*) from asm_jam_test d where (d.doc.getClobVal()) like '%NTCPO01%'; -- got 1No, don't do it like that.
Use existsNode() function in this situation :
SQL> select count(*)
2 from asm_test
3 where existsNode(doc, '/ReceiptDesc/Receipt/ReceiptDtl[user_id="NTCPO01"]') = 1
4 ;
COUNT(*)
         1
when i try to find out the Item_id of specific receipt_nbr i got a NULL response.Yes, that's because this :
extract(doc,'/ReceiptDesc/Receipt/ReceiptDtl/receipt_nbr/text()').getstringVal()returns :
69023406902344So obviously it cannot be equal to '6902340'.
When you have to deal with repeating nodes individually, use XMLTable function to break the structure into relational rows and columns.
The resultset you'll get acts as a virtual table (or inline view) you can then manipulate with SQL operations :
SQL> select x.*
2 from asm_test t
3     , xmltable(
4         '/ReceiptDesc/Receipt/ReceiptDtl'
5         passing t.doc
6         columns item_id     varchar2(15) path 'item_id'
7               , receipt_nbr varchar2(15) path 'receipt_nbr'
8       ) x
9 ;
ITEM_ID         RECEIPT_NBR
509720          6902340
509740          6902344
Now, you can just add a WHERE clause to filter the RECEIPT_NBR you require :
SQL> select x.item_id
2 from asm_test t
3     , xmltable(
4         '/ReceiptDesc/Receipt/ReceiptDtl'
5         passing t.doc
6         columns item_id     varchar2(15) path 'item_id'
7               , receipt_nbr varchar2(15) path 'receipt_nbr'
8       ) x
9 where x.receipt_nbr = '6902340'
10 ;
ITEM_ID
509720
That can also be achieved with EXTRACTVALUE and a single XPath expression (assuming RECEIPT_NBR is unique) :
SQL> select extractvalue(
2           doc
3         , '/ReceiptDesc/Receipt/ReceiptDtl[receipt_nbr="6902340"]/item_id'
4         ) as item_id
5 from asm_test
6 ;
ITEM_ID
509720

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Need help in extracting value from an xml tag.

Hi ALL,
Good Morning to all, i have problem in fetching a value from a xml tag. I have created a xml schema based on the schema i have created a xmltype table and inserted a value to the table. When i am trying to fetch a value from a particular tag i am unable to do so.. Kindly help me to solve this. Here by i am posting all the workings i have done...
I am using the following client:
SQL*Plus: Release 10.2.0.1.0 - Production on Mon Jan 31 11:44:59 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
////////////////////////////////// XML Schema ///////////////////////
begin
dbms_xmlschema.registerSchema(
'http://www.oradev.com/chipsxml.xsd',
'<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.oradev.com/chipsxml.xsd"
xmlns:samp="http://www.oradev.com/chipsxml.xsd"
version="1.0">
<element name="Field1">
<complexType>
<sequence>
     <element name="UTI">
          <complexType>
          <sequence>
          <element name = "U01" type = "string"/>
          <element name = "U02" type = "string"/>
          <element name = "U03" type = "string"/>
          <element name = "U03a" type = "string"/>
          <element name = "U03b" type = "string"/>
          <element name = "U03c" type = "string"/>
          <element name = "U04" type = "string"/>
          <element name = "U05" type = "string"/>
          </sequence>
          </complexType>
     </element>
</sequence>
</complexType>
</element>
</schema>',
TRUE, TRUE, FALSE, FALSE);
end;
////////////////////////// Table which has multiple Column //////////////////////////
CREATE TABLE chipsxmltable1 (
id number, XMLDATA XmlType)
XMLTYPE XMLDATA STORE AS OBJECT RELATIONAL
XMLSCHEMA "http://www.oradev.com/chipsxml.xsd"
ELEMENT "Field1";
///////////////////////////////// Insert Query in chipsxmltable //////////////////////////
INSERT INTO chipsxmltable VALUES(
xmltype.createxml('<?xml version="1.0"?>
<samp:Field1 xmlns:samp="http://www.oradev.com/chipsxml.xsd" >
<UTI>
<U01>No</U01>
<U02>Y</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
</samp:Field1>'));
To show the data as a field with structure:
1. Query:
Select * from chipsxmltable1;
Output:
ID XMLDATA
1 <?xml version="1.0"?>
<samp:Field1 xmlns:samp="http://www.oradev.com/chipsxml.xsd">
<UTI>
<U01>No</U01>
<U02>No</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
</samp:Field1>
2. Query: (Both the query displays the same Output)
     SELECT X.xmldata.getClobVal() "XMLDATA" FROM chipsxmltable1 X;
     select extract(XMLDATA, '/Field1').getstringval() "XMLDATA" from chipsxmltable1 x;
Output:
XMLDATA
<?xml version="1.0"?>
<samp:Field1 xmlns:samp="http://www.oradev.com/chipsxml.xsd">
<UTI>
<U01>No</U01>
<U02>No</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
</samp:Field1>
To show the data as a single string without structure using "getstringval()":
3. Query
     select extract(XMLDATA, '//text()').getstringval() "CHIPS - XML" from chipsxmltable1 x;
OUtput:
CHIPS - XML
NoNoYYYYYY
To show the data as a single string without structure using "getclobval()":
4.Query
     select extract(XMLDATA, '//text()').getClobVal() "CHIPS - XML" from chipsxmltable1 x;
Output:
CHIPS - XML
NoNoYYYYYY
To show the data in a particular tag with/Without structure (Which is not working) using "EXTRACT" function:
6.Query:
     select extract(XMLDATA, '/Field1/text()').getstringval() "XMLDATA" from chipsxmltable1 x;
     select extract(XMLDATA, '/Field1/UTI').getstringval() "XMLDATA" from chipsxmltable1 x;
     select extract(XMLDATA, '/Field1/UTI/U01').getstringval() "XMLDATA" from chipsxmltable1 x;
     select extract(XMLDATA, '/Field1/UTI/U01/text()').getstringval() "XMLDATA" from chipsxmltable1 x;
Output:
CHIPS - XML
The above queries are not fetching the value.
To show the data in a particular tag with/Without structure (Which is not working) using "EXTRACTVALUE" function:
7. Query:
     select extractValue(XMLDATA, '/Field1/UTI') "XMLDATA" from chipsxmltable1 x;
     select extractValue(XMLDATA, '/Field1/UTI/U01') "XMLDATA" from chipsxmltable1 x;
Output:
X
The above queries are not fetching the value.
My question is:
How to fetch values from xml tag when the value are inserted through xml schema?
Apologies if the description is not clear. Kindly let me know if further details are needed. Many thanks for your help.
Very best regards,
Godwin Jebakumar C.V.

Hi,
You need to declare the namespace of each element used in the XPath expression, like this :
SQL> select extractvalue( XMLDATA
2                     , '/samp:Field1/UTI/U01'
3                     , 'xmlns:samp="http://www.oradev.com/chipsxml.xsd"' ) "XMLDATA"
4 from chipsxmltable1 x
5 ;
XMLDATA
No
SQL> select extract( XMLDATA
2                , '/samp:Field1/UTI'
3                , 'xmlns:samp="http://www.oradev.com/chipsxml.xsd"'
4                ).getstringval() "XMLDATA"
5 from chipsxmltable1 x
6 ;
XMLDATA
<UTI>
<U01>No</U01>
<U02>Y</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
Please see EXTRACT and EXTRACTVALUE documentation :
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions051.htm#i1006712
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions052.htm#SQLRF06173
BTW, "XMLDATA" is a pseudo-column used by Oracle. I don't know if it'll ever cause any conflict but maybe you should rename your column.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/pseudocolumns010.htm#SQLRF00256
Regards.

Extracting the Attributes values of an XML Element

Dear Forum Members
Please tell me any XML Function which is used to extract the Attribute value of an XML Element.
Given below
<BRKCD_STREDSWTINVIN_C Key="6708">
is an Element With some Key value.
I want to have that Key value.
Using Extract and Extractvalue I am not able to get the Attribute value.
Is there any way..
Regards
Madhu K

Your xml is not really complete ;), but this should get you started:
michaels> with t as
(select xmltype('<BRKCD_STREDSWTINVIN_C Key="6708"></BRKCD_STREDSWTINVIN_C>') xml from dual)
select d.xml, d.xml.extract('//BRKCD_STREDSWTINVIN_C/@Key') key
from t d
XML KEY
<BRKCD_STREDSWTINVIN_C Key="6708"></BRKCD_STREDSWTINVIN_C> 6708

How to extract attribute value from an XML

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