Aggregation API

Pass AggregateFn objects to Dataset.aggregate() or Dataset.groupby().aggregate() to compute aggregations.

AggregateFn	Defines an aggregate function in the accumulator style.
Count	Defines count aggregation.
Sum	Defines sum aggregation.
Min	Defines min aggregation.
Max	Defines max aggregation.
Mean	Defines mean aggregation.
Std	Defines standard deviation aggregation.
AbsMax	Defines absolute max aggregation.
Quantile	Defines Quantile aggregation.
Unique	Defines unique aggregation.