---
schema_version: "1"
id: cc3608d03fb5e463569dd5e15598bd88237827e6522fde09a2df6fb7349547ab
title: Edit Data Extension Relationships
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_cab_edit_data_extension_relationships.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_cab_edit_data_extension_relationships.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: c4b19bf04463a31fcdd96151b07ab49c4ee2273eebb339ce3aaaeb7ccd90cb6e
description: Follow these steps to edit data extension relationships in Contact Builder.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Edit Data Extension Relationships

Follow these steps to edit data extension relationships in Contact Builder.

1. Navigate to a data relationship in the constellation view.
2. Click the link between two attributes:
    1. To remove the relationship between two data extensions, click the link.
    2. Click the dropdown menu next to the data extension name and select the cardinality for your data relationship. The main contact record doesn't show a dropdown menu and always displays a cardinality of One.
        - One-to-One
        - One-to-Many
        - Many-to-One
        - Many-to-Many
    3. Select a data extension attribute in the first column of the **Link Data Extension** window.
    4. Select a data extension attribute in the second column of the **Link Data Extension** window. You can only match attributes of the same data type. For example, match an email address to an email address or a mobile number to a mobile number.
    5. Repeat these steps for any additional attributes to link between those two data extensions.
    6. To edit changes you performed during this procedure, click **Change** under the name of the data extension in the second column.
3. When you complete the editing process, click **Save****.**