About the Book: SQL and Relational Theory: 3rd Edition
SQL is full of difficulties and traps for the unwary. You can avoid them if you
understand relational theory, but only if you know how to put that theory into
practice. In this book, Chris Date explains relational theory in depth, and
demonstrates through numerous examples and exercises how you can apply it to
your use of SQL.
This third edition has been revised, extended, and improved throughout. Topics
whose treatment has been expanded include data types and domains, table
comparisons, image relations, aggregate operators and summarization, view
updating, and subqueries. A special feature of this edition is