# JoinPlugin The "Join" plugin helps you concatenate the data available in two different arrays. It returns an array as a string by concatenating all of the elements in the two arrays, separated by commas or a specified separator string, keeping the original array intact. For instance, you can use this plugin to combine employee records with department details to create a comprehensive employee directory. This allows you to create custom datasets tailored to your unique needs. ### How to Use? Drag and drop the Join plugin into your flow. Configure the plugin by selecting or specifying the key attributes of the arrays you want to join. 1. Save and execute to see your data seamlessly joined for a richer and more insightful experience. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.reasy.ai/help/getting-started/workspace/tools/data-driven-plugins/data-sources/joinplugin.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.