Grouping functions

Reference documentation for Expressif functions in the array/grouping scope.

Name	Overview
group	Groups pairs by structurally equal keys while preserving first-seen group and value order.
group-by	Groups input values by keys calculated from one or more expressions.
key	Associates the input value with a key calculated by one or more expressions.
pivot	Groups values by row and column, applies a grouping summary, and reshapes the cells into records.
unpivot	Converts selected present record fields into rows, preserving retained fields and source order.