> For the complete documentation index, see [llms.txt](https://docs.acho.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acho.io/acho-studio/data-prep-projects/applying-actions/data-cleaning/deduplicate.md). # Deduplicate Duplicate records can be a nightmare to deal with, polluting the data and hard to detect. Acho makes duplicate detection and elimination easy with the Deduplicate action. Select the combination of key fields to summarize duplicate by (try your Primary Keys!), and then select to show duplicate or simply eliminate them. Show Duplicate action will filter the table to only records that are non-distinct per the duplicate check keys, this is often good for data exploration. Once checked, if it is determined that the duplicates are invalid and should be eliminated, the Eliminate Duplicates action will keep only one unique record per key and eliminate the excess. ![](/files/-McWKcr58u3C08d-ST-b) --- # 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: ``` GET https://docs.acho.io/acho-studio/data-prep-projects/applying-actions/data-cleaning/deduplicate.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.