How important is it to have a primary key for CDTs linked to data stores?

Having a primary key for Custom Data Types (CDTs) that are linked to data stores is essential for data integrity. A primary key serves as a unique identifier for each record in a database table, ensuring that every entry can be distinguished from others. This uniqueness is crucial for maintaining data integrity because it prevents duplicate entries, enables accurate data retrieval, and fosters reliable relationships between different data entities.

When a primary key is defined, it enforces constraints that help prevent inconsistencies within the data. For instance, if a business process relies on tracking data through various stages or interactions, having a primary key allows for the secure linking and referencing of related records across multiple tables or data sources.

The importance of a primary key extends to the operational aspects of the application being built. It facilitates efficient querying, updating, and deleting of records while maintaining the relationships that stem from those links. A well-designed database schema, including the use of primary keys, contributes significantly to the overall robustness of the application and its ability to handle and manipulate data effectively.