Lex deHaan & Karen Morton 
Beginning Oracle SQL [PDF ebook] 

1: Relational Database Systems and Oracle. 2: Introduction to SQL and the Interactive Query Tools. 3: Data Definition, Part I. 4: Retrieval: The Basics. 5: Retrieval: Functions. 6: Data Manipulation. 7: Data Definition, Part II. 8: Retrieval: Multiple Tables and Aggregation. 9: Retrieval: Advanced Features. 10: Views. 11: Writing Automating SQL Scripts. 12: Object-Relational Features. Appendix A: The Seven Case-study Tables.

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 Oak Table network (http://www.oaktable.net).