# Find earliest document per id **URL:** \ **Category:** Elasticsearch\ **Created:** [December 4, 2019, 1:46pm UTC](https://discuss.elastic.co/t/find-earliest-document-per-id/210546 "2019-12-04T13:46:27Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ngruson](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ngruson/32/98978_2.png) [@ngruson](https://discuss.elastic.co/u/ngruson)\ **Post date:** [December 4, 2019, 1:46pm UTC](https://discuss.elastic.co/t/find-earliest-document-per-id/210546/1 "2019-12-04T13:46:27Z")
I have an index in Elasticsearch which contains multiple documents per ID. For the 50 most recent IDs, I'd like to select the first document based on the timestamp. Is such a thing possible with Elasticsearch? For example, several documents with the fields ID and Timestamp: ID, Timestamp **1, 16:00** 1, 16:05 1, 16:10 **2, 17:00** 2, 17:10 2, 17:20 Cheers, Nils ---
**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:** [December 4, 2019, 1:50pm UTC](https://discuss.elastic.co/t/find-earliest-document-per-id/210546/2 "2019-12-04T13:50:01Z")
You can use [field collapsing](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-body.html#request-body-search-collapse) for that. You'd sort on the timestamp, and collapse on the ID. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 1, 2020, 1:50pm UTC](https://discuss.elastic.co/t/find-earliest-document-per-id/210546/3 "2020-01-01T13:50:22Z")
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