array_min function
Applies to: 
Databricks SQL Databricks Runtime
Returns the minimum value in array.
Syntax
array_min(array)
Arguments
array: Any ARRAY with elements for which order is supported.
Returns
The result matches the type of the elements.
NULL elements are skipped.
If array is empty, or contains only NULL elements, NULL is returned.
Examples
SQL
> SELECT array_min(array(1, 20, NULL, 3));
1