topic Re: How do I concatenate two fields into a string? in Splunk Search

How do I concatenate two fields into a string?

brettgladys — Wed, 20 Oct 2010 01:04:23 GMT

I have two fields, application and servletName. I'd like to have them as column names in a chart. I'm currently trying to use eval to make a new variable named fullName, and concatenate the values for application and servletName with a dash(-) in the middle. How do I do this?

Thanks, Brett

Re: How do I concatenate two fields into a string?

brettgladys — Wed, 20 Oct 2010 01:10:29 GMT

Well...a typo did it.

eval fullName=applicationName. "-" .servletName

Turns out that not putting the right name of a field causes the entire operation to return nada.

Re: How do I concatenate two fields into a string?

ftk — Wed, 20 Oct 2010 01:12:01 GMT

You can use the eval search command for this.

Concatenate fieldA, a dash, and fieldB into newField:

| eval newField= fieldA."-".fieldB

Re: How do I concatenate two fields into a string?

chris — Thu, 07 Jul 2016 10:54:05 GMT

This is a question that has many hits. I just wanted to point out that there is another possibility

<basesearch> | strcat field1 " some text: " field2 " more text: " field3 newField

This will concatenate fields and text to the new field 'newField'

strcat has the advantage that it will still create the new field if one of the fields that are concatenated are empty/missing

http://docs.splunk.com/Documentation/Splunk/latest/SearchReference/strcat

Re: How do I concatenate two fields into a string?

bcronrath — Wed, 27 Jul 2016 18:44:37 GMT

Amazing, this is exactly what I've been looking for, ty!

Re: How do I concatenate two fields into a string?

simonverzijl — Fri, 23 Aug 2019 08:14:48 GMT

Excellent! This is what I needed to concatenate a tag to another string. Eval is not working for this, but this is :

| strcat host "(" tag::host ")" label

Re: How do I concatenate two fields into a string?

raghuramj — Wed, 05 Aug 2020 15:49:01 GMT

You can concatenate two fields using eval

ex: eval Full_Name= 'First Name'. " " .'Last Name'

Re: How do I concatenate two fields into a string?

hoben — Fri, 24 Jun 2022 20:11:41 GMT

'strcat' works great for more than two fields as well. The 'allrequired=f' flag also allows you to concatenate the fields that exist and ignore those that don't.

Example:

| strcat allrequired=f email "|" uname "|" secondaryuname identity

The above will combine the three fields, 'email', 'uname', and 'secondaryuname' into the single field 'identity', delimitating by the pipe character.

Re: How do I concatenate two fields into a string?

jkat54 — Wed, 01 Feb 2023 12:00:51 GMT

I accepted this as the solution because it was the earliest one that mentioned eval with periods/dots for the concatenation which is the most common approach I've seen in the last 12 years since this answer was written.

Nice work!

I do believe the | strcat works too, but didnt check before writing this.