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PL/SQL If

PL/SQL supports the programming language features like conditional statements and iterative statements. Its programming constructs are similar to how you use in programming languages like Java and C++.

Syntax for IF Statement:

There are different syntaxes for the IF-THEN-ELSE statement.

Syntax: (IF-THEN statement):

This syntax is used when you want to execute statements only when condition is TRUE.

Syntax: (IF-THEN-ELSE statement):

This syntax is used when you want to execute one set of statements when condition is TRUE or a different set of statements when condition is FALSE.

Syntax: (IF-THEN-ELSIF statement):

This syntax is used when you want to execute one set of statements when condition1 is TRUE or a different set of statements when condition2 is TRUE.

Syntax: (IF-THEN-ELSIF-ELSE statement):

It is the most advance syntax and used if you want to execute one set of statements when condition1 is TRUE, a different set of statement when condition2 is TRUE or a different set of statements when both the condition1 and condition2 are FALSE.

When a condition is found to be TRUE, the IF-THEN-ELSE statement will execute the corresponding code and not check the conditions any further.

If there no condition is met, the ELSE portion of the IF-THEN-ELSE statement will be executed.

ELSIF and ELSE portions are optional.

Example of PL/SQL If Statement

Let's take an example to see the whole concept:

After the execution of the above code in SQL prompt, you will get the following result:

a is not less than 20
value of a is : 500
PL/SQL procedure successfully completed. 
Next TopicPL/SQL Case




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