What is the primary focus of the Bottom Up approach in database integration?

The Bottom Up approach in database integration primarily focuses on creating tables after generating Common Data Types (CDTs). This approach emphasizes utilizing existing database structures and then defining CDTs based on those structures. By first examining how the data is structured within the current database, developers can create CDTs that accurately represent the data types and relationships found in the existing tables.

This method allows for a more precise mapping of application requirements to the existing database schema. It can lead to efficient development, as it works directly with the current data models, ensuring that the application aligns with the data already in place. Ultimately, the Bottom Up approach centers on leveraging the existing infrastructure during the development process, which is essential for maintaining data integrity and consistency.

In contrast to the chosen answer, the other options do not encapsulate the essence of the Bottom Up approach. Automatically generating SQL scripts is an aspect of automation rather than focusing on a direct relationship with the existing database structure. Using existing databases without modifications overlooks the integration process that necessitates understanding and adapting to those databases. Designing CDTs first before any tables represents a Top Down approach where the design leads the development rather than building from existing data structures.