# Group Values with Aggregation **URL:** \ **Category:** Elasticsearch\ **Created:** [September 19, 2019, 3:34pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255 "2019-09-19T15:34:17Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![code\_blue](https://avatars.discourse-cdn.com/v4/letter/c/7ea924/32.png) [@code\_blue](https://discuss.elastic.co/u/code_blue)\ **Post date:** [September 19, 2019, 3:34pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/1 "2019-09-19T15:34:18Z")
I am trying to write an aggregation query but not sure what I am missing here. I have the following structure across multiple documents. Some of the field names may not be present in documents. ``` { "CaptureData": [{ "FieldName": "A", "FieldValue": [ "xyz" ] }, { "FieldName": "B", "FieldValue": [ "pqr" ] }] } ``` I am able to aggregate on different field names, but I want to also aggregate values for each field bucket. So I want to create a bucket for A and see list of values under A. ---
**Author:** ![abdon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/abdon/32/9195_2.png) [@abdon](https://discuss.elastic.co/u/abdon)\ **Post date:** [September 20, 2019, 10:15am UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/2 "2019-09-20T10:15:49Z")
How have you mapped your data? You will need to map `CaptureData` as a [nested field](https://www.elastic.co/guide/en/elasticsearch/reference/current/nested.html) in order to do this. Once you have done that, you will be able to execute [a nested aggregation](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-nested-aggregation.html) on `CaptureData`. Inside that nested aggregation, you can use a [terms aggregation](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-terms-aggregation.html) to get a set of buckets for `FieldName` and inside of that a terms aggregation on `FieldValue` to get a list of values under each `A`, `B`, etc. ---
**Author:** ![code\_blue](https://avatars.discourse-cdn.com/v4/letter/c/7ea924/32.png) [@code\_blue](https://discuss.elastic.co/u/code_blue)\ **Post date:** [September 20, 2019, 1:55pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/3 "2019-09-20T13:55:06Z")
This is what I have in mapping: ``` { "CaptureData": { "properties": { "FieldName": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, "FieldValue": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } } } } } ``` ---
**Author:** ![abdon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/abdon/32/9195_2.png) [@abdon](https://discuss.elastic.co/u/abdon)\ **Post date:** [September 20, 2019, 2:22pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/4 "2019-09-20T14:22:19Z")
Alright, you did not map `CaptureData` as type `nested`. When creating the index apply the following mapping instead (the only difference is for `CaptureData`): ```auto PUT my_index { "mappings": { "properties": { "CaptureData": { "type": "nested", "properties": { "FieldName": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, "FieldValue": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } } } } } } } ``` Next, you can index a document like the one your shared in your original post: ```auto PUT my_index/_doc/1 { "CaptureData": [ { "FieldName": "A", "FieldValue": [ "xyz" ] }, { "FieldName": "B", "FieldValue": [ "pqr" ] } ] } ``` And execute the nested aggregation I mentioned earlier: ```auto GET my_index/_search { "size": 0, "aggs": { "my_nested": { "nested": { "path": "CaptureData" }, "aggs": { "field_names": { "terms": { "field": "CaptureData.FieldName.keyword", "size": 10 }, "aggs": { "field_values": { "terms": { "field": "CaptureData.FieldValue.keyword", "size": 10 } } } } } } } } ``` ---
**Author:** ![code\_blue](https://avatars.discourse-cdn.com/v4/letter/c/7ea924/32.png) [@code\_blue](https://discuss.elastic.co/u/code_blue)\ **Post date:** [September 20, 2019, 3:01pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/5 "2019-09-20T15:01:58Z")
Getting the following error: Root mapping definition has unsupported parameters: [CaptureData : {type=nested, properties={FieldValue={type=text, fields={keyword={ignore\_above=256, type=keyword}}}, FieldName={type=text, fields={keyword={ignore\_above=256, type=keyword} ---
**Author:** ![abdon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/abdon/32/9195_2.png) [@abdon](https://discuss.elastic.co/u/abdon)\ **Post date:** [September 20, 2019, 3:14pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/6 "2019-09-20T15:14:00Z")
What version of Elasticsearch are you using? If you're still on version 6, the request would be: ```auto PUT my_index { "mappings": { "_doc": { "properties": { "CaptureData": { "type": "nested", "properties": { "FieldName": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, "FieldValue": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } } } } } } } } ``` ---
**Author:** ![code\_blue](https://avatars.discourse-cdn.com/v4/letter/c/7ea924/32.png) [@code\_blue](https://discuss.elastic.co/u/code_blue)\ **Post date:** [September 23, 2019, 3:18pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/7 "2019-09-23T15:18:55Z")
Thanks a lot. this works. However it seems this doesn't work from Kibana when I am doing Sub Series Aggregation. Any idea what I might have to change as I want to make it work from Kibana as well. ---
**Author:** ![abdon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/abdon/32/9195_2.png) [@abdon](https://discuss.elastic.co/u/abdon)\ **Post date:** [September 23, 2019, 3:48pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/8 "2019-09-23T15:48:00Z")
Yeah, Kibana has very limited support for nested aggregations. You may want to take a look at [Vega visualizations](https://www.elastic.co/guide/en/kibana/current/vega-graph.html). Those allow you to visualize whatever Elasticsearch returns, including the response of a nested aggregation. There is however a bit of a learning curve to working with Vega. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 21, 2019, 3:48pm UTC](https://discuss.elastic.co/t/group-values-with-aggregation/200255/9 "2019-10-21T15:48:04Z")
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