Introduction

The CASE expression is used to implement if-then logic.

Syntax

• CASE input_expression

WHEN compare1 THEN result1

[WHEN compare2 THEN result2]…

[ELSE resultX]

END

• CASE

WHEN condition1 THEN result1

[WHEN condition2 THEN result2]…

[ELSE resultX]

END

Remarks

The simple CASE expression returns the first result whose compareX value is equal to the input_expression.

The searched CASE expression returns the first result whose conditionX is true.

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