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
date_published fields. Directus automatically uses a built-in title formatter to display your database column names prettified, and you can use schema translations to completely rename them if needed.
Fields also mirror other characteristics from their associated column, including its
Fields that reference other items (in the same collection or different) are called relational fields. Linking or connecting data relationally is an immensely powerful feature of relational databases and SQL queries.
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) and Many-to-Many (M2M), represent data that is stored in other tables. Then there are Presentation Fields that don't save data at all, such as dividers and action buttons.