Use the MIN aggregate function to compute the minimum value in the column or column expression, specified by value_expression. MIN is valid for character data as well as numeric data. For a character expression, MIN returns the lowest sort order.
Each aggregate join index must be created with a COUNT(*) or COUNT(value_expression). If you do not specify such an expression, the system adds a COUNT(*) by default.
You cannot specify a MIN function in the definition of a column-partitioned join index.
For more information about the MIN aggregate function, see SQL Functions, Expressions, and Predicates, B035-1145.