Group-by query operation.

Builds a / <property> query fragment. Partitions the prior axis's entries by property and then expects a subsequent reduction (Sum(), Mean(), ...).

Usage

GroupBy(value, ...)

Arguments

value

Property name to group by (character scalar), or a piped DafrQuery.

...

Optional piped DafrQuery.

Value

A DafrQuery.

See also

GroupRowsBy(), GroupColumnsBy(), CountBy()

Examples

GroupBy("donor")
#> <DafrQuery> / donor