ElasticSearch Cookbook - Second Edition

Executing the histogram aggregation

ElasticSearch numerical values can be used to process histogram data. The histogram representation is a very powerful way to show data to end users.

Getting ready

You need a working ElasticSearch cluster and an index populated with the script (chapter_06/executing_histogram_aggregations.sh) available at https://github.com/aparo/elasticsearch-cookbook-second-edition.

How to do it...

Using the items populated with the script, we want to calculate aggregations on:

• Age with an interval of 5 years
• Price with an interval of 10$
• Date with an interval of 6 months

To execute histogram aggregations, we will perform the steps given as follows:

1. The query will be as follows:

   curl -XGET 'http://127.0.0.1:9200/test-index/test-type/_search?pretty=true&size=0' ...