# CSV lookup (multiple input, multiple output)

**URL:** <https://discuss.elastic.co/t/csv-lookup-multiple-input-multiple-output/211229>\
**Category:** Logstash\
**Created:** [December 10, 2019, 6:42am UTC](https://discuss.elastic.co/t/csv-lookup-multiple-input-multiple-output/211229 "2019-12-10T06:42:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![a.kuz](https://avatars.discourse-cdn.com/v4/letter/a/b5ac83/32.png) [@a.kuz](https://discuss.elastic.co/u/a.kuz)\
**Post date:** [December 10, 2019, 6:42am UTC](https://discuss.elastic.co/t/csv-lookup-multiple-input-multiple-output/211229/1 "2019-12-10T06:42:09Z")

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Hello. There is the way to lookup from file with multiple fields input and multiple fileds output?  
For example:  
I have csv like  
field name field1 field2 field3 field4 field5  
field data 1 2 3 4 5

And input data:  
field name data1 data2 data3  
field data 6 7 8

I want:  
If field1.name == data1.name and field5.name == data3.name then  
add\_fields to data input: field2, field3, field4

Is it possible only by concating in one string? What are the ways to achieve this?  
Thanks!

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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:** [January 7, 2020, 6:51am UTC](https://discuss.elastic.co/t/csv-lookup-multiple-input-multiple-output/211229/2 "2020-01-07T06:51:39Z")

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