What method should be exclusively used for domain queries?

The method that should be exclusively used for domain queries is domain paths. Domain paths provide a structured way to retrieve information based on the domain, ensuring that the queries respect the security and access controls inherent in the ServiceNow platform. By utilizing domain paths, users can effectively filter records based on their assigned domains, maintaining the appropriate visibility and access levels for different users and groups.

This method is particularly important as it allows for a safe and standardized way to handle data within a multi-tenant architecture. It ensures that data access is properly managed according to the specified domain hierarchy, preventing unauthorized access to information across different domains.

In contrast, sys_domain_path values and dynamic domain objects may be relevant to domain-related functionality but do not serve the purpose of executing queries in the same dedicated manner as domain paths. Direct SQL queries could provide a way to access the database directly, but this method bypasses the application layer's security and query optimizations, which can lead to data integrity and access control issues. Hence, for performing domain-specific queries, domain paths are the ideal and approved method.