Which special SAS name totals all variables in a dataset?

The special SAS name that totals all variables in a dataset is actually referred to as "all." This name is used in various SAS procedures to reference every variable within a dataset effortlessly. When employed in aggregation functions or other calculations, it simplifies the process of including all variables without individually naming them. For instance, using "all" in a procedure enables you to perform operations such as summing or averaging across all variables in a dataset, enhancing flexibility and efficiency in data analysis.

The other options represent different aspects: "numeric" includes only the numerical variables in the dataset, while "character" targets the character variables. Furthermore, "sum" is not a special SAS name; rather, it's a function that calculates the sum of specified numeric values or variables. These distinctions highlight the specific capabilities and applications of each name, underscoring why "all" is the correct choice when the goal is to total all variables in a dataset comprehensively.