概述
继续跟中华石杉老师学习ES，第39篇
课程地址： https://www.roncoo.com/view/55
案例
需求： 统计指定品牌下每个颜色的销量
原始数据：
示例
类比下SQL：
select count(*) from tvs.sales where brand = '小米' group by price
es aggregation的范围 scope ，任何的聚合，都必须在搜索出来的结果数据中之行，搜索结果，就是聚合分析操作的scope .
统计“小米”品牌下每个颜色的销量
GET /tvs/sales/_search { "query": { "term": { "brand": "小米" } }, "aggs": { "group_by_color": { "terms": { "field": "color" } } }, "size": 0 }
返回
{ "took": 0, "timed_out": false, "_shards": { "total": 5, "successful": 5, "skipped": 0, "failed": 0 }, "hits": { "total": 2, "max_score": 0, "hits": [] }, "aggregations": { "group_by_color": { "doc_count_error_upper_bound": 0, "sum_other_doc_count": 0, "buckets": [ { "key": "绿色", "doc_count": 1 }, { "key": "蓝色", "doc_count": 1 } ] } } }
