nvl function

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

Returns expr2 if expr1 is NULL, or expr1 otherwise. This function is a synonym for `coalesce(expr1, expr2)` with two arguments.

Syntax 

nvl(expr1, expr2)

Arguments

  • expr1: An expression of any type.

  • expr2: An expression that shares a least common type with expr1.

Returns

The result type is the least common type of the argument types.

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

Examples 

> SELECT nvl(NULL, 2);
 2

> SELECT nvl(3, 2);
 3