Group data by specified columns and apply aggregation functions to each group.
ds_in
dataset
required
The input dataset containing the columns to group by and apply aggregations on.
ds_out
dataset
required
A dataset containing the aggregated results based on the grouping operations.
by
array
required
Columns to group by.
An array specifying the columns used for grouping. The by parameter can be either:
An array of column names (e.g., ["column1", "column2"]), which defaults to EXACT grouping.
An array of objects with columnName, groupingType, and optional param properties.
aggregations
array[object]
required
Aggregation functions to apply.
An array specifying the aggregation functions to apply on each group.
The array can be empty, in which case no aggregations are performed, but the dataset is still grouped by the specified columns.
