Chapter 5. Conditional Control: IF Statements


Oracle® PL/SQL® Interactive Workbook, Second Edition
By Benjamin Rosenzweig, Elena Silvestrova
Table of Contents

Chapter Objectives

In this Chapter, you will learn about:

  • IF Statements

  • ELSIF Statements

  • Nested IF Statements

In almost every program that you write, you need to make decisions. For example, if it is the end of the fiscal year, bonuses must be distributed to the employees based on their salaries. In order to compute employee bonuses, a program needs to have a conditional control. In other words, it needs to employ a selection structure (you learned about selection structure in Chapter 1).

Conditional control allows you to control the flow of the execution of the program based on a condition. In programming terms, it means that the statements in the program are not executed sequentially. Rather, one group of statements or another will be executed depending on how the condition is evaluated.

In PL/SQL, there are three types of conditional control: IF, ELSIF, and CASE statements. In this chapter, you will explore two types of conditional controlIF and ELSIFand how these types can be nested one inside of another. CASE statements are discussed in the next chapter.


    Oracle PL. SQL Interactive Workbook
    Oracle PL/SQL Interactive Workbook (2nd Edition)
    ISBN: 0130473200
    EAN: 2147483647
    Year: 2002
    Pages: 146

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