PREFACE
The most powerful tool in the world today is information. The most powerful information tool in the world is the relational database. The leading relational database in the world is Oracle. And the core language at the foundation of all Oracle products is Oracle’s Structured Query Language, or SQL, a language that is common to all major relational databases of all vendors worldwide. This book is designed to prepare you to become a certified expert in that language by preparing you for the Oracle Database SQL Expert exam, 1Z0-047.
The objective of this study guide is to prepare you for the 1Z0-047 exam by familiarizing you with the technology and body of knowledge tested on the exam. Because the primary focus of the book is to help you ...
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