> For the complete documentation index, see [llms.txt](https://docs.trymito.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trymito.io/how-to/interacting-with-your-data/using-vlookup.md). # Using VLOOKUP {% embed url="" %} A quick example of using VLOOKUP in Mito. {% endembed %} #### Instructions for Using VLOOKUP to join dataframes 1. Double click on the first cell in a column where you want to use a VLOOKUP 2. Click on the first cell of the lookup key, in the same dataframe that you are editing. 3. Switch to the dataframe you're looking up in 4. Click on the column header that is the key for your lookup in the new dataframe 5. Holding `Shift`, click on the column header of the value you want. 6. Enter the index of that new column as the third argument. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.trymito.io/how-to/interacting-with-your-data/using-vlookup.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.