Working with XML
Beginning with SQL Server 2005, Microsoft added the XML data type, the XQuery language, and several new functions for working with XML data in addition to the functionality found in SQL Server 2000. XML stands for Extensible Markup Language, and it looks a lot like HTML except that it generally contains data while HTML is used to create web pages. Companies often use XML to exchange data between incompatible systems or with their vendors and customers. SQL Server also extensively uses XML data to store query plans.
Fully covering XML support in SQL Server would take another complete book, so I’ll just briefly discuss ...