iff function
Applies to:  Databricks SQL 
 Databricks Runtime
Returns expr1 if cond is true, or expr2 otherwise. This function is a synonym for if function.
Syntax
iff(cond, expr1, expr2)
Arguments
- cond: A BOOLEAN expression.
- expr1: An expression of any type.
- expr2: An expression that shares a least common type with- expr1.
Returns
The result is the common maximum type of expr1 and expr2.
Examples
SQL
> SELECT iff(1 < 2, 'a', 'b');
 a