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:
代码语言:javascript复制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
代码语言:javascript复制GET /tvs/sales/_search
{
"query": {
"term": {
"brand": "小米"
}
},
"aggs": {
"group_by_color": {
"terms": {
"field": "color"
}
}
},
"size": 0
}
返回
代码语言:javascript复制{
"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
}
]
}
}
}