Final answer:
The $max, $min, $avg, and $sum accumulators are used in the group stage for performing calculations on numeric values in MongoDB's Aggregation Framework.
Step-by-step explanation:
The $max, $min, $avg, and $sum accumulators are used in the group stage for performing calculations on numeric values. They are commonly used in programming languages like MongoDB's Aggregation Framework.
The $max accumulator returns the maximum value in a set of values. For example, if you have a set of numbers [5, 2, 8, 3], the $max accumulator would return 8 as the maximum value.
The $min accumulator returns the minimum value in a set of values. Using the same set of numbers, $min would return 2 as the minimum value.
The $avg accumulator returns the average of a set of values. For the numbers [5, 2, 8, 3], $avg would return 4.5 as the average.
The $sum accumulator returns the sum of a set of values. Using the same set of numbers, $sum would return 18 as the sum.