How can relationships between models be established in dbt?

In dbt, relationships between models can be established through the use of schema.yml files, specifically by utilizing directives within that file. This is essential for defining how the models relate to one another, such as establishing foreign key relationships or defining documentation and metadata for the models.

When you define relationships in the schema.yml, you can provide information on the dependencies between models, which aids dbt in understanding how to build your data pipeline efficiently. This information helps with testing, documentation generation, and maintaining the integrity of data flows as you transform your datasets.

The directives within the schema.yml allow users to set constraints and annotate their models effectively, enhancing both collaboration among team members and the clarity of the data architecture. Consequently, this makes the schema.yml an integral part of establishing and managing relationships in dbt workflows.