> For the complete documentation index, see [llms.txt](https://docs.fact-finder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fact-finder.com/integration/factfinder-search-integration/optional-interfaces/changing-deleting-and-adding-records-delta-updates.md).

# Changing, deleting and adding records (delta updates)

This interface lets you update, delete, or add individual records or batches of records in the search database.

> Changes made through this interface may be overwritten by the next data import.

The product data export from your shop system remains the basis for imports. Use this interface mainly for temporary fixes or quick record corrections.

Changes are available in search immediately. When you save the database, the changes are written to disk and remain available after a restart. Saving requires processing power, so it should not be done after every single change request.

### REST-Interface

The REST API documentation is part of the search application and is available at \[your NG server]/fact-finder/swagger-ui.html. You can also access it here:

Swagger Link: <https://ng-demo.fact-finder.de/fact-finder/swagger-ui.html>

The relevant methods are documented under `records`. In addition to parameter documentation, you can test requests and inspect the results directly. Because the documentation is built with Swagger, you can also use Swagger Codegen to generate a client for your code.

> Important:
>
> * Only send actual data changes to FactFinder.
> * Queue updates and send multiple changes in one request whenever possible.
> * Use delta updates for incremental changes, and keep a regular daily `csv` import as your baseline.


---

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