# Fields

> Fields are a specific type of value within a Collection, storing the data of your item's content. Each field represents a **column** in your database.

For example, an `articles` collection might have `title`, `body`, `author`, and `date_published` fields. Directus automatically uses a built-in title formatter to display your database column names prettified, and you can use [schema translations](/concepts/translations/#schema-translations) to completely rename them if needed.

Fields also mirror other characteristics from their associated column, including its `type`, `default`, `length`, `allow_null`, etc.

::: tip Relational Fields

Fields that reference other items (in the same collection or different) are called [relational fields](/concepts/relationships/). Linking or
connecting data relationally is an immensely powerful feature of relational databases and SQL queries.

:::

::: tip Aliases

Not all fields in Directus map directly to an actual database column within their table — these are called "alias" fields. For example, certain relational fields, like [One-to-Many (O2M)](/concepts/relationships/#one-to-many-o2m) and [Many-to-Many (M2M)](/concepts/relationships/#many-to-many-m2m), represent data that is stored in _other_ tables. Then there are [Presentation Fields](/guides/field-types/presentation-field/) that don't save data at all, such as dividers and action buttons.

:::

#### Relevant Guides

- [Creating a Standard Field](/guides/field-types/standard-field)
- [Creating a Presentation Field](/guides/field-types/presentation-field)
- [Creating a Many-to-One Field](/guides/field-types/many-to-one-field)
- [Creating a One-to-Many Field](/guides/field-types/one-to-many-field)
- [Creating a Many-to-Many Field](/guides/field-types/many-to-many-field)
- [Creating a Many-to-Any Field](/guides/field-types/many-to-any-field)
- [Creating Translated Fields](/guides/field-types/translated-fields)
- [Duplicating Fields](/guides/fields/#duplicating-a-field)
- [Adjusting Field Layout](/guides/fields/#adjusting-field-layout)
- [Deleting Fields](/guides/fields/#deleting-a-field)