From the reviews:
"It starts with the mathematical foundation of relational databases: concepts and their notation are introduced step-by-step, defined, and clearly explained. … this book is a very good introduction to the foundations of database design for an intermediate or advanced audience … ." (K. Balogh, ACM Computing Reviews, Vol. 49 (12), December, 2008)
About the Author
Lex de Haan studied applied mathematics at the University of Technology in Delft, the Netherlands. His experience with Oracle goes back to the mid-1980s, version 4. He worked for Oracle Corporation from 1990 to 2004 in various education-related roles, ending up in Server Technologies (product development) as senior curriculum manager for the advanced database administration curriculum. In that role, he was involved in the development of Oracle9i and Oracle Database 10g. In March 2004, he decided to go independent and founded Natural Join B.V. (http://www.naturaljoin.nl). From 1999 until his passing in 2006, he was involved in the ISO SQL language standardization process, as a member of the Dutch national body. He was also one of the founding members of the OakTable network (http://www.oaktable.net).