# Join query in elasticsearch

**URL:** <https://discuss.elastic.co/t/join-query-in-elasticsearch/151570>\
**Category:** Elasticsearch\
**Created:** [October 9, 2018, 7:58am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570 "2018-10-09T07:58:06Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![shwesinhan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shwesinhan/32/78663_2.png) [@shwesinhan](https://discuss.elastic.co/u/shwesinhan)\
**Post date:** [October 9, 2018, 7:58am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/1 "2018-10-09T07:58:06Z")

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hi team

can anyone convert this sql query to elasticsearch dsl query or lucene query or painless script?

> select (t2.log\_timestamp - t1.log\_timestamp) as elapsed\_time  
> from tbl\_logs t1 inner join tbl\_logs t2  
> on t1.order\_id = t2.order\_id

plz guide  
appreciate!!

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [October 9, 2018, 8:06am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/2 "2018-10-09T08:06:11Z")

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You cannot do joins in Elasticsearch.

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<div class="post-metadata">

**Author:** ![shwesinhan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shwesinhan/32/78663_2.png) [@shwesinhan](https://discuss.elastic.co/u/shwesinhan)\
**Post date:** [October 9, 2018, 8:07am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/3 "2018-10-09T08:07:20Z")

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any option to emulate joining?

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**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:** [October 9, 2018, 8:15am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/4 "2018-10-09T08:15:42Z")

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You can create an entity-centric index with one document per order. As new time stamps and other information arrives you then update the appropriate document instead of storing it separately. This will make it a lot easier to run the type of queries you described.o

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<div class="post-metadata">

**Author:** ![shwesinhan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shwesinhan/32/78663_2.png) [@shwesinhan](https://discuss.elastic.co/u/shwesinhan)\
**Post date:** [October 9, 2018, 8:34am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/5 "2018-10-09T08:34:50Z")

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@Christian_Dahlqvist

you mean to become one doc., right?  
but actually my app logs are continuous. how do i create entity-centric index one document per order? 😥  
plz guide me.  
appreciate!!!

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**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:** [October 9, 2018, 11:56am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/6 "2018-10-09T11:56:13Z")

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Have a look at [this Elastic{ON} talk](https://www.elastic.co/videos/entity-centric-indexing-mark-harwood). [This video](https://www.youtube.com/watch?v=yBf7oeJKH2Y) may also be useful.

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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:** [November 6, 2018, 11:56am UTC](https://discuss.elastic.co/t/join-query-in-elasticsearch/151570/7 "2018-11-06T11:56:13Z")

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