What are Bucket Aggregations?
Bucket aggregations in Elasticsearch are used to group documents into different buckets based on specified criteria. Each bucket can contain multiple documents that match the criteria. Unlike metric aggregations, which calculate metrics on numeric fields, bucket aggregations focus on grouping data.
Bucket aggregations can be combined with metric aggregations to perform complex analytics. For instance, you can group documents by a field (like category) and then calculate the average price within each group.
Bucket Aggregation in Elasticsearch
Elasticsearch is a robust tool not only for full-text search but also for data analytics. One of the core features that make Elasticsearch powerful is its aggregation framework, particularly bucket aggregations. Bucket aggregations allow you to group documents into buckets based on certain criteria, making it easier to analyze and summarize your data.
This article will explain what bucket aggregations are, how they work, and provide detailed examples to help you understand their usage.