# Count error in canvas

**URL:** <https://discuss.elastic.co/t/count-error-in-canvas/208203>\
**Category:** Kibana\
**Tags:** canvas\
**Created:** [November 17, 2019, 6:56am UTC](https://discuss.elastic.co/t/count-error-in-canvas/208203 "2019-11-17T06:56:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Yungyoung\_Ok](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yungyoung_ok/32/43465_2.png) [@Yungyoung\_Ok](https://discuss.elastic.co/u/Yungyoung_Ok)\
**Post date:** [November 17, 2019, 6:57am UTC](https://discuss.elastic.co/t/count-error-in-canvas/208203/1 "2019-11-17T06:57:00Z")

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The values ​​aggregation from visualize and canvas are different.  
The time was set equally.  
Why is it so different?

**metric(visualize)**

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/c/4/c4d7e10375a13f60c2f77d99146627cde84d0cb1.png)

**canvas**

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/d/7/d791f985822ee687211699e9e8a1fe456be64353.png)

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<div class="post-metadata">

**Author:** ![Marius\_Dragomir](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marius_dragomir/32/42087_2.png) [@Marius\_Dragomir](https://discuss.elastic.co/u/Marius_Dragomir)\
**Post date:** [November 19, 2019, 4:37am UTC](https://discuss.elastic.co/t/count-error-in-canvas/208203/2 "2019-11-19T04:37:29Z")

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Hello,  
Using the TinyMath unique function in Canvas after retrieving the datasource will give you the number of unique values in the 1000(?) documents you get back from `esdocs` For canvas the equivalent of the Unique Count will be the COUNT\_DISTINCT SQL command .

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<div class="post-metadata">

**Author:** ![Yungyoung\_Ok](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yungyoung_ok/32/43465_2.png) [@Yungyoung\_Ok](https://discuss.elastic.co/u/Yungyoung_Ok)\
**Post date:** [November 22, 2019, 1:19am UTC](https://discuss.elastic.co/t/count-error-in-canvas/208203/3 "2019-11-22T01:19:39Z")

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Can you explain in more detail?

my sql: SELECT DISTINCT COUNT(field\_name) FROM "index\_name"  
 ![image](https://us1.discourse-cdn.com/elastic/original/3X/c/8/c85584d301bbd3595c6336d5e4744c834fd182fc.png)

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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:** [December 20, 2019, 1:19am UTC](https://discuss.elastic.co/t/count-error-in-canvas/208203/4 "2019-12-20T01:19:49Z")

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