# How Relationships Work in Data Connect

DevFeed: [How Relationships Work in Data Connect](<https://devfeed.tech/articles/how-relationships-work-in-data-connect-16576.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2025/01/dataconnect-relationships>)

Author: Andrea Wu

Published: 2025-01-28T00:00:00Z

Content type: tutorial

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Firebase](<https://devfeed.tech/topics/firebase.md>), [Database](<https://devfeed.tech/topics/database.md>), [Structured-data](<https://devfeed.tech/topics/structured-data.md>)

Tags: [database](<https://devfeed.tech/tags/database.md>), [databases](<https://devfeed.tech/tags/databases.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [graphql](<https://devfeed.tech/tags/graphql.md>), [postgresql](<https://devfeed.tech/tags/postgresql.md>), [schema](<https://devfeed.tech/tags/schema.md>), [sql-connect](<https://devfeed.tech/tags/sql-connect.md>), [tutorials](<https://devfeed.tech/tags/tutorials.md>)

## AI overview

This tutorial explains how Firebase Data Connect models one-to-one, one-to-many, and many-to-many relationships using schemas, queries, mutations, primary keys, and foreign keys.

## Source excerpt

News, tutorials, and updates from the Firebase team.