Working with XML in Databases
More and more users are storing XML documents in database columns, especially when XML data is sent or received from other entities. Storing data in XML helps enterprises more easily accommodate revisions to industry-standard data formats as XML Schemas evolve over time. One challenge in migrating from a relational database to an XML-oriented database application is developing queries that replace traditional SQL queries of relational data to parse XML documents stored in the database. We recently had an opportunity to address XQuery for XML in databases in a presentation titled Altova Tools for DB2® in a teleconference sponsored by IBM® for the pureXML™ Devotees user group. After an introduction and brief background on Altova, we focused on the special functionality included in XMLSpy to manage XML Schemas in DB2 and to edit XML data stored in DB2. The XMLSpy Database Query Window makes it easy to edit XML database content directly in XMLSpy. Altova has built specialized capabilities for deep integration of Altova tools with the DB2 pureXML data server to help customers working with XML, XML Schema, XQuery, and other XML-related technologies. We demonstrated the XMLSpy XQuery editor, XQuery debugger and XQuery profiler, with support for executing XQuery scripts directly against the DB2 database and for the special DB2 xmlcolumn and sqlquery operators. We closed the presentation with a walk-through of the steps a user can take to migrate legacy relational data to an XML-based application, including inferring an XML Schema from relational data in a table in DB2, then importing data from the table and automatically tagging it in XML according to the new XML Schema. We have uploaded a PDF file the slides from the presentation on SlideShare. You can also get a copy at the IBM pureXML Devotees page, where you can listen to the recorded audio as well. The best way to experience for yourself how well the features of XMLSpy, MapForce, StyleVision, and DatabaseSpy work with DB2 and other databases with XML is to click here to download a free trial of the Altova MissionKit.