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69 lines
2.7 KiB
Markdown
69 lines
2.7 KiB
Markdown
---
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title: 'Data Sources'
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description: 'NocoDB Data-Source sync, access control & re-config'
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---
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## Overview
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`Data Sources` sub-menu includes
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- Database Metadata
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- UI Access Control
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- ERD
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- Add/Remove new data source
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- Edit existing data source configuration
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- Edit data source visibility options
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Note that, currently only one external data source can be added per project.
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## Accessing Data Sources
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To access it, click the down arrow button next to Project Name on the top left side, then select `Team & Settings` and clicking `Data Sources`.
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<img width="322" alt="image" src="https://user-images.githubusercontent.com/35857179/194856648-67936db0-ee4d-4060-be3d-af9f86ef8fc6.png" />
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## Sync Metadata
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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](/0.109.7/setup-and-usages/sync-schema) for more.
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## UI Access Control
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Go to `Data Sources`, click ``UI ACL``, you can control the access to each table by roles.
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## ERD
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Go to `Data Sources`, click ``ERD``, you can see the ERD of your database.
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### Junction table names within ERD
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- Enable `Show M2M Tables` within `Project Settings` menu
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- Double click on `Show Columns` to see additional checkboxes get enabled.
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- Enabling which you should be able to see junction tables and their table names.
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## Edit external database configuration parameters
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Go to `Data Sources`, click ``Edit``, you can re-configure database credentials.
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Please make sure database configuration parameters are valid. Any incorrect parameters could lead to schema loss!
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## Unlink data source
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Go to `Data Sources`, click ``Delete`` against the data source that you wish to un-link.
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## Data source visibility
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Go to `Data Sources`, toggle ``Radio-button`` against the data source that you wish to hide/un-hide.
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