Aggregation API

Pass AggregateFnV2 objects to Dataset.aggregate() or Dataset.groupby().aggregate() to compute aggregations.

AggregateFnV2	Provides an interface to implement efficient aggregations to be applied to the dataset.
AggregateFn	NOTE: THIS IS DEPRECATED, PLEASE USE AggregateFnV2 INSTEAD
Count	Defines count aggregation.
Sum	Defines sum aggregation.
Min	Defines min aggregation.
Max	Defines max aggregation.
Mean	Defines mean (average) aggregation.
Std	Defines standard deviation aggregation.
AbsMax	Defines absolute max aggregation.
Quantile	Defines Quantile aggregation.
Unique	Defines unique aggregation.
ValueCounter	Counts the number of times each value appears in a column.
MissingValuePercentage	Calculates the percentage of null values in a column.
ZeroPercentage	Calculates the percentage of zero values in a numeric column.
ApproximateQuantile	PublicAPI (alpha): This API is in alpha and may change before becoming stable.
ApproximateTopK	PublicAPI (alpha): This API is in alpha and may change before becoming stable.