# Aggregation across indices **URL:** \ **Category:** Elasticsearch\ **Created:** [August 26, 2014, 12:34pm UTC](https://discuss.elastic.co/t/aggregation-across-indices/19461 "2014-08-26T12:34:25Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ElasticSearch\_Users\_](https://avatars.discourse-cdn.com/v4/letter/e/b4bc9f/32.png) [@ElasticSearch\_Users\_](https://discuss.elastic.co/u/ElasticSearch_Users_)\ **Post date:** [August 26, 2014, 12:34pm UTC](https://discuss.elastic.co/t/aggregation-across-indices/19461/1 "2014-08-26T12:34:25Z")
Hi, If I have two indices each having part of the record and joined using some common identifier, can I issue a query across both indices and have aggregations apply taking into consideration both indices? Example: Index 1: Type 1: ID: String Field1: String Field2: String Index 2: Type 2: ID: String (From above. I can keep this same to behave like a foreign key.) Field3: String Field4: String Can I effect a join across both indices and aggregate on Field4 for example? Please let me know. Thanks, Sandeep -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/2b839a9a-b109-4948-8d8b-58107f77572e%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/2b839a9a-b109-4948-8d8b-58107f77572e%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![vineeth\_mohan\_2](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vineeth_mohan_2/32/747_2.png) [@vineeth\_mohan\_2](https://discuss.elastic.co/u/vineeth_mohan_2)\ **Post date:** [August 26, 2014, 12:46pm UTC](https://discuss.elastic.co/t/aggregation-across-indices/19461/2 "2014-08-26T12:46:22Z")
Hello Sandeep , What you are intending is not possible. But then Elasticsearch do have some good relational operations which needs to be defined before indexing. If you can elaborate your use case , we can help on this. Thanks Vineeth On Tue, Aug 26, 2014 at 6:04 PM, 'Sandeep Ramesh Khanzode' via elasticsearch [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) wrote: > Hi, > > If I have two indices each having part of the record and joined using some > common identifier, can I issue a query across both indices and have > aggregations apply taking into consideration both indices? > > Example: > Index 1: Type 1: > ID: String > Field1: String > Field2: String > > Index 2: Type 2: > ID: String (From above. I can keep this same to behave like a foreign key.) > Field3: String > Field4: String > > Can I effect a join across both indices and aggregate on Field4 for > example? > > Please let me know. Thanks, > Sandeep > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/2b839a9a-b109-4948-8d8b-58107f77572e%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/2b839a9a-b109-4948-8d8b-58107f77572e%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/2b839a9a-b109-4948-8d8b-58107f77572e%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/2b839a9a-b109-4948-8d8b-58107f77572e%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAGdPd5%3D93B%2Bk1QCKQHg\_n%3D%3Da9Yih9Lyi1k4Gt\_LZ7kywnBiroQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAGdPd5%3D93B%2Bk1QCKQHg_n%3D%3Da9Yih9Lyi1k4Gt_LZ7kywnBiroQ%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:06am UTC](https://discuss.elastic.co/t/aggregation-across-indices/19461/3 "2017-07-06T01:06:27Z")