Ok, thanks

1. I will ask Cobol Developer if DB calls are segregated like Client Server app ? But in the Cobol source code, how the DB calls are separated?, perhaps sample code will help 🙂

2. My Bad it is 12,000,000 12 million records, Perhaps Oracle is better suited.

3. As far as understanding how the records link to each other, how will it help me ? because want to be careful on bugging Cobol developer ? 🙂