# Relationships

In Power BI, relationships play a crucial role in connecting and establishing associations between different tables within a data model.

### User Interface

<figure><img src="https://2181169139-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIZ1QNzp28aI8y60mWhbR%2Fuploads%2F8blxFQQ1QxoCKbkVtnZY%2Fimage.png?alt=media&#x26;token=72c127a2-0bd0-4e18-9e9c-f09b7de4b66b" alt=""><figcaption></figcaption></figure>

1. **From:** \
   Source table or entity in the relationship.
2. **Relationship type:** \
   Type of association between tables (e.g., one-to-many/one-to-one/many-to-many).
3. **To:** \
   Target table or entity in the relationship.
4. **Active Relationship: (Yes/No)**\
   Indicates if the relationship is currently active or disabled.
5. **Cross Filter Direction:** \
   Specifies how filters flow between tables in the relationship.
6. **Assume Referential Integrity: (Yes/No)**\
   Assumption that foreign keys have valid references.
7. **Apply Security Filter in both direction: (Yes/No)**\
   Security filters are applied in both directions of the relationship for data access control.

{% hint style="info" %}
The "Apply Security Filter in both Directions" is available only when the Cross Filter Direction is "Both"
{% endhint %}