A guide to SQL focusing on the AS/400 DB2/400 dialect, for programmers and users working with relational database management systems in the AS/400 midrange environment. The tutorial format takes readers through SQL tasks that deal with the retrieval and manipulation of data in relational databases, and covers built-in functions, accessing multiple tables, and creating indexes and views. The guide outlines other SQL/400 topics such as the view concept, security, transaction processing, and the role of SQL in a client/server system. Annotation copyright Book News, Inc. Portland, Or.