Applies to: Databricks SQL Databricks Runtime
Returns the first non-null argument.
exprN: Any expression that shares a least common type across all
The result type is the least common type of the arguments.
There must be at least one argument.
Unlike for regular functions where all arguments are evaluated before invoking the function,
evaluates arguments left to right until a non-null value is found.
If all arguments are
NULL, the result is