In this post we cover Elasticsearch Aggregations. Elasticsearch Aggregation API’s main task allows you to summarize, calculate, and group the data in near real time. An important feature here is that our aggregations can implement sub-aggregations, which in turn implement more sub-aggregations. You can implement these sub-aggregations as much as needed. You can use aggregations in a variety of actions, from building analytical reports, to getting real-time analysis of data and taking quick actions. This allows for a flexible API.
The aggregation functionality is completely different from search and enables you to ask sophisticated questions to the data. Let’s practice with this tool.
Note: If you have no experience with aggregations in Elastic, please read this article first.