Storing & Retrieving XML data using Oracle

Date: 11-Jul-2009Place: St. Joseph’s College of Engineering

• Introduction - XML• Oracle’s XML Support• Storing XML Data• Retrieving XML Data• References• Q & A

Agenda

Next generation of storage format for Office products

Common platform for developing open standard applications

Widely accepted and driven by W3C (www.w3.org)

Interchange with External Organizations

XML DB – Native, flexible, high-performance, scalable storage & processing

Introduction - XML

Oracle’s XML Support

Creating Directory

CREATE DIRECTORY xmldir AS 'c:\txt\';

Creating Table to store XML content

CREATE TABLE mytable2 OF XMLType;

Inserting into XML Table from file

INSERT INTO mytable2 VALUES (XMLType(bfilename('XMLDIR', 'purchaseorder.xml'), nls_charset_id('AL32UTF8')));

Storing XML Data

Retrieving XML Data

To get Reference under PurchaseOrder

SELECT extract(OBJECT_VALUE, '/PurchaseOrder/Reference') from mytable2

To get all values under LineItem value 1

SELECT extract(OBJECT_VALUE, '/PurchaseOrder/LineItems/LineItem[1]') FROM mytable2;

To get all Description from the XML Table

SELECT extract(OBJECT_VALUE, '/PurchaseOrder/LineItems/LineItem/Description') FROM mytable2;

To get value of Description

SELECT extractValue(value(d),'/Description') FROM mytable2 p, table (xmlsequence(extract(p.object_value,'/PurchaseOrder/LineItems/LineItem/Description'))) d WHERE existsNode(p.object_value,'/PurchaseOrder[Reference="SBELL-2002100912333601PDT"]') = 1;

References

www.oracle.com/technology/tech/xml/xmldb/index.html

http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28369/toc.htm

http://www.w3.org/XML/

http://msdn.microsoft.com/hi-in/xml/default(en-us).aspx

http://apex.oracle.com/i/index.html

Q&A

Thanks for sharing your time with me

Wish you all the best