Here’s a prototype for using the SQL/XML function XMLTABLE to map XML data into relational rows and columns.
This solution uses the standard EMP table — the same can be extended to work with any XMLTYPE-relational mapping.
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XML DB
After the post on models for storing XML data in Oracle and examples of binary XML storage, here’s a detailed look at the rigorous and performant structured XML storage or object-relational storage.
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The previous post on storing XML data in Oracle gave an overview of binary XML storage: compact, flexible, compatible with XML data with or without associated XML schema.
This post shows working examples of binary XML storage
1.1. without XML Schema
1.2 with XML Schema
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Oracle provides an abstract SQL data type called XMLType for storing XML data in the database. You can create an XMLType table, or an XMLType column in a relational table, to persist XML data.
Different storage models are available in Oracle to best fit the nature of the XML data and its expected use. These are:
- Binary XML storage
- Structured storage (object-relational)
- Unstructured XML storage (CLOB)
Here’s an overview of each of these XML storage models with the use cases the model is appropriate for.
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Oracle has built-in functions to convert relational data into XML format easily. These functions comes under the umbrella of SQL/XML, a specification that supports the mapping and manipulation of XML from SQL.
This article shows you how to generate XML from relational data using Oracle SQL/XML functions as building blocks.
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