SQL Clearly Explained, 3rd Edition details the release of the SQL standard (SQL:2008), including two sets of extensions to support object-relational databases and XML. NEW chapters include coverage of the relational data model, relational algebra, SQL object-relational support, triggers and stored procedures, as well as XML. This expanded edition is packed with tips, tricks and other vital information for working with SQL.Demonstrates how to formulate SQL queries and how queries are processed to maximize performance of the database management system Explains use of SQL to enter, modify or delete data to maintain database structural elements Covers in great detail new SQL application for XML to meet the growing XML usage in development of online content