---
schema_version: "1"
id: d3f4aea26b97356a5c71116ce80de911c6ee9724e8fdf619c9f0ed90c69b6332
title: Create a Data Relationship in Marketing Cloud Engagement
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_es_create_data_relationship.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_es_create_data_relationship.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: cf17c38143d1d59be72eb5c6ddcd9236e2b73671c1a9d07f6ec9d338f5687d3b
description: Create a data relationship between data extensions in Email Studio.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Create a Data Relationship in Marketing Cloud Engagement

Create a data relationship between data extensions in Email Studio.

Before you start this procedure, you must create the data extensions that are involved in the relationship. After you complete this procedure and populate the data extensions with data, you can include information from a data extension in a message to subscribers.

1. Click **Subscribers** | **Data Relationships** | **Create**.
2. In the Properties section, provide a name, description, and external key for the data relationship. The external key identifies the data relationship in API calls.
3. In the Fields section, use the <select object> list boxes to identify the data extensions involved in the data relationship, and use the <select field> list boxes to identify the data extension fields involved in the relationship.
4. If more than one column in each data extension is involved, click **Add** to display another set of <select field> list boxes.
5. Save your changes.

#### See Also

- [Subscriber Key in Marketing Cloud Engagement](https://help.salesforce.com/s/articleView?id=mktg.mc_es_subscriber_key.htm&release=264.0.0&type=5 "A subscriber key is a text field that contains a value that uniquely identifies a subscriber in Marketing Cloud Engagement. A subscriber key is limited to 254 English characters. Avoid using email addresses as subscriber keys.")
- [Data Relationships](https://help.salesforce.com/s/articleView?id=mktg.mc_es_data_relationships.htm&release=264.0.0&type=5 "A data relationship in Email Studio specifies that a column in one data extension contains the same kind of information as a column in another data extension or in a subscriber attribute. Use a data relationship to relate two data extensions based on a common column contained in both data extensions. You can then apply a filter to the two data extensions and create a new segment of data.")