[Part II] PL/SQL Language Elements Part II Part II: PL/SQL Language Elements Part II of this book describes the essential language constructs provided by PL/SQL. It includes extensive examples of these constructs and explains how to use them most effectively. Chapter 4, Variables and Program Data, explains variables and constants in PL/SQL programs and presents the various PL/SQL datatypes. Chapter 5, Conditional and Sequential Control, describes how to use various types of IF, THEN, and ELSE constructs, as well as the NULL and GOTO statements. Chapter 6, Database Interaction and Cursors, describes how to use explicit and implicit cursors. Chapter 7, Loops, explains the different types of loops -- LOOP, FOR LOOP, and WHILE LOOP. Chapter 8, Exception Handlers, discusses the various types of exceptions, including predefined, named programmer-defined, unnamed internal, and unnamed programmer-defined. Chapter 9, Records in PL/SQL, describes how to use table-based, cursor-based, and programmer-defined records. Chapter 10, PL/SQL Tables, explains how to declare and use tables, and how to apply them to a variety of tasks. 3.7 Documenting the Entire Package4. Variables and Program Data Copyright (c) 2000 O'Reilly & Associates. All rights reserved.