# Count distinct by date

**URL:** <https://discuss.elastic.co/t/count-distinct-by-date/200845>\
**Category:** Elasticsearch\
**Created:** [September 24, 2019, 10:58am UTC](https://discuss.elastic.co/t/count-distinct-by-date/200845 "2019-09-24T10:58:07Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Quang\_D\_Tr\_n](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/quang_d_tr_n/32/54722_2.png) [@Quang\_D\_Tr\_n](https://discuss.elastic.co/u/Quang_D_Tr_n)\
**Post date:** [September 24, 2019, 10:58am UTC](https://discuss.elastic.co/t/count-distinct-by-date/200845/1 "2019-09-24T10:58:07Z")

</div>

I am trying to count distinct date in a field so I followed the [cardinality aggregation](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-cardinality-aggregation.html) to do it but it failed to return the expected result, any suggestion on what I am doing wrong please?

```
{
"query": {
	"bool": {
		"filter": [ 
			{"term": { "Id": "793"} },
			 {"range": {
				"starttime": {
					"gte": "2019-08-12T11:20:00",
					"lte": "2019-08-12T11:30:00"
				}
			 } }
		]
	}
},
"aggs": {
    "sessions": {
        "terms" : { "field" : "stationid" },
        "aggs": {
            "total_minute": {
                "sum": {"script":"doc['stoptime'].date.getMillis() - doc['starttime'].date.getMillis()"}
            }
        }
    } ,
   "count_starttime": {
    	"cardinality" : 
            {"script":"doc['starttime'].date.dayOfMonth"}
  }
}

```

}

---

<div class="post-metadata">

**Author:** ![Mark\_Harwood](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mark_harwood/32/10538_2.png) [@Mark\_Harwood](https://discuss.elastic.co/u/Mark_Harwood)\
**Post date:** [September 24, 2019, 11:22am UTC](https://discuss.elastic.co/t/count-distinct-by-date/200845/2 "2019-09-24T11:22:12Z")

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Presumably the correct answer is, at most,"1 day" given your query is a 10 minute window.  
What answer do you get?

---

<div class="post-metadata">

**Author:** ![Quang\_D\_Tr\_n](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/quang_d_tr_n/32/54722_2.png) [@Quang\_D\_Tr\_n](https://discuss.elastic.co/u/Quang_D_Tr_n)\
**Post date:** [September 30, 2019, 9:16am UTC](https://discuss.elastic.co/t/count-distinct-by-date/200845/3 "2019-09-30T09:16:35Z")

</div>

> [@Quang\_D\_Tr\_n](#):
>
> e'].date.dayOfMonth"} } }

I think I figure out the proper way to do it. Thanks Mark for pointing out the 1 day condition in my query:

```
{
"query": { "term": { "username": { "value": "guest@bdtt" } } },
"aggs": {
"sessions": {
    "terms" : { "field" : "callingstationid" },
    "aggs": {
        "total_minute": {
            "sum": {"script":"doc['acctstoptime'].date.getMillis() - doc['acctstarttime'].date.getMillis()"}
        },
        "count_starttime": {
	    	"cardinality" : 
	            {"script":"doc['acctstarttime'].date.dayOfMonth"}
		}
    }
}

}
}

```

---

<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:** [October 28, 2019, 9:17am UTC](https://discuss.elastic.co/t/count-distinct-by-date/200845/4 "2019-10-28T09:17:43Z")

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