Cardinality aggregation | Reference

A single-value metrics aggregation that calculates an approximate count of distinct values. Assume you are indexing store sales and would like to count the unique number of sold products that match a query: POST /sales/_search?size=0 { "aggs": { "type_count": { "cardinality": { "field": "type" } } } }

[taketyan]

Elasticsearch で COUNT(DISTINCT user_id) 相当のことができるようになってるっぽい！Kibana でも使えるようになってたら最高だ