Description 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 an.
O'reilly Media Sql and relational theory: how to write accurate sql code, paperback/chris j. date
