> For the complete documentation index, see [llms.txt](https://docs.ngsurvey.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ngsurvey.com/fr/installation-setup/installation/backend-de-base-de-donnees.md).

# Backend de Base de données

ngSurvey peut être exécuté en utilisant l’une des bases de données suivantes comme backend. 

* [Microsoft SQL Server](/fr/installation-setup/installation/backend-de-base-de-donnees/microsoft-sql-server.md)
* [MySQL](/fr/installation-setup/installation/backend-de-base-de-donnees/oracle-mysql.md)
* [MariaDB](/fr/installation-setup/installation/backend-de-base-de-donnees/mariadb.md)
* [PostgreSQL](/fr/installation-setup/installation/backend-de-base-de-donnees/postgresql.md)

{% hint style="danger" %}
Une fois configurée, il n’est actuellement pas possible de migrer une base de données ngSurvey existante d’un fournisseur de base de données vers un autre fournisseur.
{% endhint %}


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