Lex de Haan eBooks

This exceptional book explains fundamentals in detail, supported by realistic examples, while most other books on the market do not properly cover such basics. If you work with relational databases you need to understand the SQL language. And you will gain full competence to define, access, and manipulate data in an Oracle database, if you do so following this book's guidance. This book is fully compliant with the latest version of the ANSI SQL standard, and fully updated for the Oracle 10g database. Furthermore, this book is based on a popular Netherlands college textbook (currently in its third edition). And author Lex de Haan is vastly experienced with the Oracle database, and has 25 years of teaching experience. de Haan is also a member of the A...

Relational databases hold data, right? They do indeed, 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. A far more powerful way of thinking lies in relational technologys foundation in the mathematical disciplines of logic and set theory. Databases contain truths or propositions describing some area of interest such as a business. Those truths are organized into sets. Operations from logic and set theory can be applied to existing sets of truths to derive new sets of truths. Applied Mathematics for Database Professionals introduces you to this way of thinking, to the logic and set theory that underlies relational database technology. All this may sound abst...