# Group by on the sum of aggregation **URL:** \ **Category:** Kibana\ **Created:** [April 20, 2018, 3:03pm UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902 "2018-04-20T15:03:04Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![didinyah](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/didinyah/32/30859_2.png) [@didinyah](https://discuss.elastic.co/u/didinyah)\ **Post date:** [April 20, 2018, 3:03pm UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902/1 "2018-04-20T15:03:04Z")
Hi, I would like to know if there's a way to do an aggregation on the result of the sum. Let's say I have 8 documents. 6 of them have 1 revision 2 of them have 2 revisions I want to get : 1 : 6 hits 2 : 2 hits This is what I managed to get for the moment : [https://imgur.com/pTSsrHT](https://imgur.com/pTSsrHT) We can see the number of revision for EACH document, that's already cool but not enough. And this is what I would like (the black numbers indicating the number of "hits", remplace 8 by 6) [https://imgur.com/mT57mhe](https://imgur.com/mT57mhe) Thanks ---
**Author:** ![ppisljar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ppisljar/32/11588_2.png) [@ppisljar](https://discuss.elastic.co/u/ppisljar)\ **Post date:** [April 20, 2018, 3:58pm UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902/2 "2018-04-20T15:58:44Z")
how is revision indicated in your documents ? i am assuming something like this: ```auto { id: 'doc1', rev: 1 } { id: 'doc2', rev: 1 } { id: 'doc3', rev: 1 } { id: 'doc1', rev: 2 } ``` you could try something like: - pie chart - split slices, term agg, rev field - leave count as a metric agg ---
**Author:** ![didinyah](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/didinyah/32/30859_2.png) [@didinyah](https://discuss.elastic.co/u/didinyah)\ **Post date:** [April 23, 2018, 8:33am UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902/3 "2018-04-23T08:33:10Z")
Hi, Thank for the answer. Actually the revision field is a personal scripted field by doing the sum of a field : `if(doc['operation'].value == "Revisionchange") { return 1; } return 0;` So if I'm doing the sum by splicing with docID it will give me the right number right ? When I do the pie chart, splice by this scripted field and leave count as a metric I only have this pie : [https://imgur.com/a/bVKVrY0](https://imgur.com/a/bVKVrY0) Must I change the scripted field or do another operation ? ---
**Author:** ![ppisljar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ppisljar/32/11588_2.png) [@ppisljar](https://discuss.elastic.co/u/ppisljar)\ **Post date:** [April 24, 2018, 1:22pm UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902/4 "2018-04-24T13:22:16Z")
it doesn't seem you sum the revisions here ? anyway, something like this won't be possible with pie chart at the moment ... you would need to reindex your data so it contains the number of revisions as a field in your documents. you could reindex your data in a new index by: - spliting on document id in the first index - getting the revision number by summing the `revision` field - index this in a new index ---
**Author:** ![didinyah](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/didinyah/32/30859_2.png) [@didinyah](https://discuss.elastic.co/u/didinyah)\ **Post date:** [April 27, 2018, 3:39pm UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902/5 "2018-04-27T15:39:37Z")
Okay so I have to reindex all the data and add the field documentVersion after all ^^' Thank you for your help ! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 25, 2018, 3:39pm UTC](https://discuss.elastic.co/t/group-by-on-the-sum-of-aggregation/128902/6 "2018-05-25T15:39:44Z")
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