NVL

The NVL function replaces a NA value or an empty string with a string.

To evaluate a specified expression and replace a non-NA value or empty string with one value and a NA value with another, use NVL2.

Return Value

The specified replacement value when the value of the base expression is NA, or the base expression when the value of the base expression is not NA. The data type of the return value is always the same as the data type of the base expression.

Syntax

NVL (exp , replacement-exp)

Parameters

expr

The expression to replace when it has a NA value or an empty string.

replacement-exp

The value with which you want to replace a NA value.

Examples

SHOW NVL('First String', 'Second String')
First String
 
SHOW NVL('', 'Second String')
Second String