Chapter 2. PL/SQL Concepts
In the previous chapter, you were introduced to some elements of computer programming languages. In this chapter, you will be introduced to the elements of a specific programming language, PL/SQL, and how it fits in the client-server architecture.
PL/SQL stands for "Procedural Language Extensions to SQL." PL/SQL extends SQL by adding programming structures and subroutines available in any high-level language. In this chapter, you will see examples that will illustrate the syntax and the rules of the language.
PL/SQL is used for both server-side and client-side development. For example, database triggers (code that is attached to tables, discussed in a later chapter) on the server side and logic behind an Oracle Developer tool on the client side can be written using PL/SQL. In addition, PL/SQL can be used to develop applications for browsers such as Netscape or Internet Explorer when used in conjunction with the Oracle Application Server and the PL/SQL Web Development Toolkit.