Introduction to SQL, SQL*Plus, and SQL Developer
Lex de Haan, Daniel Fink, Tim Gorman, Inger Jørgensen, Karen E. Morton · Apress eBooks · 2009
This chapter provides an introduction to the SQL language and two tools for working with it. The first section presents a high-level overview of the SQL language, which will give you an idea of the capabilities of this language. Then some important basic concepts of the SQL language are introduced in the second section, such as constants, literals, variables, expressions, conditions, functions, operators, operands, and so on. Finally, this chapter provides a tour of SQL*Plus and SQL Developer, the two main tools we will use throughout this book to learn the SQL language. In order to maximize the benefits of any tool, you first must learn how to use it and to identify the main features available in that tool. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.