Aggregations

Lessons in this group, roughly in build order:

• metric-aggregations — Aggregations that compute a single number (or small set of numbers) over a set of documents — sums,…
• bucket-aggregations — Aggregations that partition documents into groups (“buckets”) by some key — a term, a numeric range, a…
• pipeline-aggregations — Aggregations that take the output of other aggregations as their input — derivatives, moving averages,…
• nested-aggregations — Two distinct ideas share the word “nested”: sub-aggregating (placing one aggregation inside another) and…
• cardinality-percentiles — Two approximate metric aggregations: cardinality counts distinct values (HyperLogLog++), and percentiles…