Oracle WebServer User's Guide
CHAPTER 4. Introduction to the Oracle7 Server and to PL/SQL
T his chapter provides an overview of the Oracle7 Server. It covers the basics of relational databases, SQL, and PL/SQL. If you already are familiar with some or all of this material, you can reasonably skip part or all of this chapter. Since there is more material on these subjects than a chapter can possibly cover, there are frequent references to other Oracle manuals that provide you with further information.