NocoDB allows you to connect to external data sources and get a unified spreadsheet view of your data. Activities related to external data sources can be managed from `Data Sources` tab in `Base dashboard`.
`Data Sources` tab includes following functionalities
`Data Sources` tab includes following functionalities
- Connect/manage external data source
1. Connect/manage external data source
- UI Access Control
2. UI Access Control
- Relations
3. Relations
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Currently only one external data source can be added per project.
Currently only one external data source can be added per project.
Go to `Data Sources`, click ``Sync Metadata``, you can see your metadata sync status. If it is out of sync, you can sync the schema. See [Sync Schema](/setup-and-usages/sync-schema) for more.
1. Access Base context menu by clicking on the `Base` name in the left sidebar
2. Click on `Data Sources` tab
3. Click on `Sync Metadata` button listed under `Actions` column for the data source that you wish to sync metadata for
4. [**Optional**] Click on `Reload` button to refresh Sync state.
5. Any changes to the metadata identified will be listed in the `Sync State` column
6. Click on `Sync Now` button to sync the metadata changes
After the sync is complete, you can see the updated state in the `Sync State` column. Sync modal also marks `Tables metadata is in Sync` in the header.
Go to `Data Sources`, click ``UI ACL``, you can control the access to each table by roles.
1. Access Base context menu by clicking on the `Base` name in the left sidebar
2. Click on `Data Sources` tab
3. Click on `UI ACL` button listed under `Actions` column for the data source that you wish to manage UI access control for
4. On the UI ACL modal, you can see the list of tables available in the data source as rows & roles available as columns. Toggle checkboxes to enable/disable access to tables for specific roles.