NVL2

The NVL2 function returns one value when the value of a specified expression is not NA or an empty string, or another value when the value of the specified expression is an empty string or NA.

To merely replace a NA value or an empty string with a string, use NVL.

Return Value

The data type of the return value is always the data type of expr2 (that is, the expression whose value is returned when the value of expr1 is not NA).

Syntax

NVL2 (expr1 , expr2 , expr3)

Arguments

expr1: The expression whose value this function evaluates.
expr2: An expression whose value is returned when the value of expr1 is not an empty string or NA.
expr3: An expression whose value is returned when the value of expr1 is NA.

Notes

Comparing Values of Different Data Types

When the data types of expr2 and expr3 are different, then the function converts expr3 to the data type of expr2 before comparing them.

Examples

Example 8-46 Working with NVL2

SHOW NVL2('Which string?', 'First String', 'Second String')
First String
 
SHOW NVL2('', 'First String', 'Second String')
Second String