# Elastic aggregation, how does it works?

**URL:** <https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114>\
**Category:** Elasticsearch\
**Created:** [May 9, 2018, 7:14am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114 "2018-05-09T07:14:57Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![vikas1994](https://avatars.discourse-cdn.com/v4/letter/v/8edcca/32.png) [@vikas1994](https://discuss.elastic.co/u/vikas1994)\
**Post date:** [May 9, 2018, 7:14am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114/1 "2018-05-09T07:14:57Z")

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Please tell the how the aggregation query works in elasticsearch. please tell the steps which aggregation will execute first in sub aggregation.?

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [May 9, 2018, 7:38am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114/2 "2018-05-09T07:38:01Z")

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Do you have an example of what you are asking for?

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<div class="post-metadata">

**Author:** ![vikas1994](https://avatars.discourse-cdn.com/v4/letter/v/8edcca/32.png) [@vikas1994](https://discuss.elastic.co/u/vikas1994)\
**Post date:** [May 9, 2018, 8:14am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114/3 "2018-05-09T08:14:59Z")

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yes, Below is the aggregation query

# table:

author weekday status  
me monday ok  
me tuesday ok  
me moday bad

# query:

{  
"size": 0,  
"aggs": {  
"author": {  
"terms": {  
"field": "author"  
},  
"aggs": {  
"days": {  
"terms": {  
"field": "weekday"  
},  
"aggs": {  
"status": {  
"terms": {  
"field": "status"  
}  
}  
}  
}  
}  
}  
}  
}

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [May 9, 2018, 8:28am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114/4 "2018-05-09T08:28:42Z")

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What do you want to know?

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<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [May 9, 2018, 8:49am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114/5 "2018-05-09T08:49:38Z")

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It is not clear what you are looking for. The [section on aggregations in the Definitive guide](https://www.elastic.co/guide/en/elasticsearch/guide/current/aggregations.html) describes aggregations and the underlying concepts quite well, even though it was written for Elasticsearch 2.x. [This blog post](https://www.elastic.co/blog/intro-to-aggregations-pt-2-sub-aggregations) is also useful even though it is old. You also have [the official documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations.html), which the current state and capabilities..

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<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:** [June 6, 2018, 8:49am UTC](https://discuss.elastic.co/t/elastic-aggregation-how-does-it-works/131114/6 "2018-06-06T08:49:38Z")

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