Looker LookML Mastery Hub: The Industry Foundation Practice

In the context of "The Complete LookML Data Modeling Course 2026," which LookML construct is primarily responsible for defining the relationships between different Explores, allowing users to traverse from one dataset to another?

According to "The Complete LookML Data Modeling Course 2026," when encountering a scenario where a single fact table needs to be joined to multiple dimension tables that share a common primary key but represent different conceptual entities (e.g., a single order joined to both a shipping address and a billing address), what LookML approach is recommended to avoid ambiguity and maintain data integrity?

"The Complete LookML Data Modeling Course 2026" emphasizes the importance of declarative modeling. When defining a `dimension` in LookML, which parameter is crucial for ensuring that Looker correctly interprets the underlying SQL data type and performs appropriate aggregations and filtering?