nvl2 function (Databricks SQL)

Returns expr2 if expr1 is not NULL, or expr3 otherwise.

Syntax

nvl2(expr1, expr2, expr3)

Arguments

  • expr1: An expression of any type.

  • expr2: An expression of any type.

  • expr3: An expression that shares a least common type with expr2.

Returns

The result is least common type of expr2 and expr3.

This function is a synonym for CASE WHEN expr1 IS NOT NULL expr2 ELSE expr3 END.

Examples

> SELECT nvl2(NULL, 2, 1);
 1
> SELECT nvl2('spark', 2, 1);
 2