nvl2 function

Applies to: check marked yes Databricks SQL check marked yes Databricks Runtime

Returns expr2 if expr1 is not NULL, or expr3 otherwise. This function is a synonym for CASE WHEN expr1 IS NOT NULL expr2 ELSE expr3 END.

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.

Special considerations apply to VARIANT types. See isnull function for details.

Examples 

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

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