Relational databases hold data, right? They indeed do, but to think
of a database as nothing more than a container for data is to miss
out on the profound power that underlies relational technology. Use
the expressive power of mathematics to precisely specify designs
and business rules. Communicate effectively about design using the
universal language of mathematics. Develop and write complex SQL
statements with confidence. Avoid pitfalls and problems from common
relational bugaboos such as null values and duplicate rows. The
math that you learn in this book will put you above the level of
understanding of most database professionals today. You'll better
understand the technology and be able to apply it more effectively.
You'll avoid data anomalies like redundancy and inconsistency.
Understanding what's in this book will take your mastery of
relational technology to heights you may not have thought possible.
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