> 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/columns/column-types.md).

# Column Types

- [Text](https://help.workdigital.io/custom-database-apps/columns/column-types/text.md): A general purpose field which may be used to store a single line of text.
- [Multi-Line](https://help.workdigital.io/custom-database-apps/columns/column-types/multi-line.md): A general purpose field which may be used to store multiple lines of text.
- [Number](https://help.workdigital.io/custom-database-apps/columns/column-types/number.md): Allows the storage of whole or decimal numbers. Fields of this type may also be automatically totalled if required.
- [Auto Number](https://help.workdigital.io/custom-database-apps/columns/column-types/auto-number.md): This field will cause a unique auto-generated ID number to be assigned to each record upon creation.
- [Currency](https://help.workdigital.io/custom-database-apps/columns/column-types/currency.md): Allows the storage of currency values, combined with a currency code/symbol. Fields of this type may also be automatically totalled if required.
- [Date/Time](https://help.workdigital.io/custom-database-apps/columns/column-types/date-time.md): Allows the storage of dates or dates/times which are specified by the user.
- [TimeInput](https://help.workdigital.io/custom-database-apps/columns/column-types/duration.md): Allows the storage of  24-hour based time values.
- [Duration](https://help.workdigital.io/custom-database-apps/columns/column-types/duration-1.md): Allows the storage of time duration value.
- [Yes/No](https://help.workdigital.io/custom-database-apps/columns/column-types/yes-no.md): This field is presented as a simple slider which may be either enabled or disabled.
- [Choice – Drop Down, Radio Button, and Check Box](https://help.workdigital.io/custom-database-apps/columns/column-types/untitled.md): Allow users to select between a number of predetermined options.
- [Email Address](https://help.workdigital.io/custom-database-apps/columns/column-types/email-address.md): This field stores a single email address.
- [Phone/Fax No.](https://help.workdigital.io/custom-database-apps/columns/column-types/phone-fax-no..md): This field may be used for storing telephone/mobile/fax numbers.
- [URL](https://help.workdigital.io/custom-database-apps/columns/column-types/url.md)
- [Relationship](https://help.workdigital.io/custom-database-apps/columns/column-types/phone-fax-no.-1.md): Using Relationship you can establish parent-child relationships between apps
- [E-Signature](https://help.workdigital.io/custom-database-apps/columns/column-types/phone-fax-no.-2.md): Digitally capture e-Signatures to create legally binding documents like contracts, SLAs, etc.
- [Formula](https://help.workdigital.io/custom-database-apps/columns/column-types/formula.md)