> For the complete documentation index, see [llms.txt](https://docs.cloudfabrix.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cloudfabrix.io/rda/rda-userguide/rda-aiops-studio/examples-jupyter/data-mapping-cfxdm-dm-functions/join.md).

# Join

**join**\
Joins input list using an optional separator. \
@param **sep** (optional), default value is ' ' . Input is expected to be a list. \
If the input is not a list, it returns the value without joining.

This function allows users to join the columns using a separator token.

### Example 1: 

Step 1: Create an empty **join\_example\_1** using AIOps studio as shown in the below screenshot.

![Empty join\_example pipeline](/files/-Me1q6TA1SZYPKhPzXr4)

Step 2: Add the following pipeline code/commands into the above-created pipeline as shown in the below screenshot:

You can copy the below code into your pipeline and execute that in your environment.\
\
\&#xNAN;*`##### This pipeline creates a simple record using AIOps studio.`*\
\
*`##### RDA function join is used to demo this example.`*\
*`##### This function uses different columns and join them using a separator character`*\
*`##### Function 'join' is used join the column values using a user provided separator`*\
\
*`@dm:empty`* \
*`--> @dm:addrow A = "Hello" & B = "World" & C = "Join" & D = "Example"`*\
*`--> @dm:map from = "A,B,C,D" & to = "X" & func = "join" & sep = ","`*<br>

![Pipeline code ](/files/-Me1rhkVHFYZwgGDBXa3)

Step 3: Click verify button to make sure syntax and pipeline code is correct (as shown below)

![Pipeline code verification without any errors](/files/-Me25536El_OLJ9mxvqT)

Step 4:  Click execute button and execute the pipeline. RDA will execute the pipeline without any errors (as shown below)

![Pipeline execution without any errors.](/files/-Me27v1qM8wLqaQ61wOo)

Step 5: RDA uses the function 'join' to join all the column values with a separate token "," and displays the output as shown in the below screenshot.

![RDA function join will join the values using separator token and displays the data.](/files/-Me28vaVs3uAKBfwJV5P)