How can you shorten expressions involving more than one field in a reference table?

Using square brackets is the correct approach to shorten expressions involving more than one field in a reference table. In the context of Kinaxis RapidResponse and similar systems, square brackets are typically employed to reference a specific field from a reference table. By enclosing the field names in square brackets, you can simplify the expression and clearly indicate that you are retrieving data from multiple fields. This not only enhances readability but also allows for easier referencing in calculations and conditions.

The alternative methods mentioned do not serve the purpose of shortening expressions effectively. Parentheses are primarily used for grouping in mathematical expressions rather than for referencing fields in this context. Set operators are used to combine or manipulate sets of data, while the IN operator is applied to check for membership within a specific set or range, which does not align with the goal of shortening field references in a reference table.