> For the complete documentation index, see [llms.txt](https://help.workdigital.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.workdigital.io/custom-database-apps/relationships.md).

# Relationships

- [Lookup](https://help.workdigital.io/custom-database-apps/relationships/lookup.md)
- [Adding a New Lookup Field](https://help.workdigital.io/custom-database-apps/relationships/lookup/adding-a-new-lookup-field.md)
- [Editing a Lookup Field](https://help.workdigital.io/custom-database-apps/relationships/lookup/editing-a-lookup-field.md)
- [Deleting a Lookup Field](https://help.workdigital.io/custom-database-apps/relationships/lookup/deleting-a-lookup-field.md)
- [Summary](https://help.workdigital.io/custom-database-apps/relationships/summary.md): This feature allows you to get summary (Total Or Average) of Lookup field from another app. The App has to be connected to another App via Lookup field.
- [Adding a New Summary Field](https://help.workdigital.io/custom-database-apps/relationships/summary/adding-a-new-summary-field.md)
- [Editing a Summary Field](https://help.workdigital.io/custom-database-apps/relationships/summary/editing-a-summary-field.md)
- [Deleting a Summary Field](https://help.workdigital.io/custom-database-apps/relationships/summary/deleting-a-summary-field.md)