# Concatenating 3 columns using Computed columns in enhanced table

**URL:** <https://discuss.elastic.co/t/concatenating-3-columns-using-computed-columns-in-enhanced-table/296269>\
**Category:** Elasticsearch\
**Created:** [February 4, 2022, 9:14am UTC](https://discuss.elastic.co/t/concatenating-3-columns-using-computed-columns-in-enhanced-table/296269 "2022-02-04T09:14:24Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Sandeep\_Raju](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sandeep\_Raju](https://discuss.elastic.co/u/Sandeep_Raju)\
**Post date:** [February 4, 2022, 9:14am UTC](https://discuss.elastic.co/t/concatenating-3-columns-using-computed-columns-in-enhanced-table/296269/1 "2022-02-04T09:14:24Z")

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Hi all,

There are 3 fields a,b,c . For every document, only 1 of them will have a value.

So I'm trying to concatenate 3 columns , but it is showing null with the string.

For example : document 1:

a=Hi  
b=  
c=

When i concatenate using `col1 || col2 || col3 ` it shows `Hinullnull`

I dont want null, I want to only display `Hi.`

I'm not supposed to use scripted fields as this is slowing my response times.  
Any ideas for the this?

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<div class="post-metadata">

**Author:** ![Sandeep\_Raju](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sandeep\_Raju](https://discuss.elastic.co/u/Sandeep_Raju)\
**Post date:** [February 4, 2022, 11:54am UTC](https://discuss.elastic.co/t/concatenating-3-columns-using-computed-columns-in-enhanced-table/296269/2 "2022-02-04T11:54:52Z")

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I got it...

I did by using col1 ? col1 : col2 ? col2 : col3 ? col3 : "NA"

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 6, 2022, 9:47pm UTC](https://discuss.elastic.co/t/concatenating-3-columns-using-computed-columns-in-enhanced-table/296269/3 "2022-02-06T21:47:18Z")

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This doesn't seem related to Elasticsearch?

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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:** [March 6, 2022, 9:47pm UTC](https://discuss.elastic.co/t/concatenating-3-columns-using-computed-columns-in-enhanced-table/296269/4 "2022-03-06T21:47:34Z")

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