# Sum\_bucket cardinality 多层 aggregation

**URL:** https://discuss.elastic.co/t/sum-bucket-cardinality-aggregation/170714
**Category:** 中文提问与讨论
**Created:** [March 4, 2019, 11:13am UTC](https://discuss.elastic.co/t/sum-bucket-cardinality-aggregation/170714 "2019-03-04T11:13:19Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![Kristen\_Chang](https://avatars.discourse-cdn.com/v4/letter/k/e274bd/32.png) [@Kristen\_Chang](https://discuss.elastic.co/u/Kristen_Chang)
#### Post date: [March 4, 2019, 11:13am UTC](https://discuss.elastic.co/t/sum-bucket-cardinality-aggregation/170714/1 "2019-03-04T11:13:19Z")

</div>

Elasticsearch版本为5.5  
以下方法1可以得到user里面cardinality的value加总，但是方法2却会得到以下错误讯息，  
buckets\_path must reference either a number value or a single value numeric metric aggregation  
请问是哪里出错？或是其他方法可以统计数据？

方法1：  
{  
"size": 0,  
"aggs": {  
"city": {  
"terms": {  
"field": "city"  
},  
"aggs": {  
"user": {  
"cardinality": {  
"field": "user"  
}  
}  
}  
},  
"count\_user":{  
"sum\_bucket":{  
"buckets\_path":"city\>user"  
}  
}  
}  
}

方法2：  
{  
"size": 0,  
"aggs": {  
"city": {  
"terms": {  
"field": "city"  
},  
"aggs": {  
"user": {  
"terms": {  
"field": "user"  
},  
"aggs": {  
"gender": {  
"cardinality": {  
"field": "gender"  
}  
}  
}  
}  
}  
},  
"count\_user":{  
"sum\_bucket":{  
"buckets\_path":"city\>user\>gender"  
}  
}  
}  
}

---

<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 1, 2019, 11:13am UTC](https://discuss.elastic.co/t/sum-bucket-cardinality-aggregation/170714/2 "2019-04-01T11:13:28Z")

</div>

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