Returns the product of the numbers in the given {1} of the {0}. If the column does not contain number values, an exception ...

Returns the product of the numbers in the given {1} of the {0}. If the column does not contain number values, an exception is thrown. 
    If a single column is provided, the return value is a single value. In case multiple columns are specified, a record value is returned with fields corresponding to every columns.