MAX is valid for character data as well as numeric data. When used with a character expression, MAX returns the highest sort order.
Nulls are not included in the result computation. For more information, see Teradata Vantage™ - SQL Fundamentals, B035-1141 and Aggregates and Nulls.
If value_expression is a column expression, the column must refer to at least one column in the table from which data is selected.
The value_expression must not specify a column reference to a view column that is derived from a function.