August 2011
Intermediate to advanced
416 pages
10h 14m
English
Content preview from Oracle Database 11g Building Oracle XML DB Applications
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Creating a Relational View on XML Data
Next, let’s look at matters from the other way around. If you have a set of XML documents, how do you access the data via relational SQL queries? Some Oracle database applications, such as APEX applications, are created mainly to work on relational database schemas. How can you enable these applications to access XML content? In Oracle XML DB 11g, the best approach is to create relational views using XMLTable().
The XMLTable() function can set up the mapping between the XML data and relational data using the XQuery and XPath expressions. The following is an example (create_email_template_ img_vw.sql):
Listing 9-8 Creating XML View in XML DB Repository Using XMLTable()
CREATE OR REPLACE VIEW email_template_img_vw ...
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