Fundamentals. What is a database? An instance? A schema? What kind of terminology will you encounter in Oracle that you most likely haven’t seen before? What are SYS and SYSTEM? I’ll explain some of the basic terminology you should be familiar with before you begin. This will arm you with the ‘lingo’ you’ll need to understand the information you’ll encounter throughout the book.
The many flavors of the Oracle database. Oracle has one core database product, but it comes in a couple of different ‘classes’. We’ll discuss the intent of each class of database, and look at some of the factors that differentiate them.
What you will find throughout this book and some things you should bear in mind as you move through it.
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