c-treeRTG COBOL Edition is a database that allows simultaneous SQL access to COBOL files, with no changes to the application logic, preventing developers to have to rewrite their COBOL programs to take advantage of the relational database models. This solution preserves all the years of investment done in mission-critical COBOL applications, with zero application migration. You can see in this video the step by step of how to achieve a full, SQL access to COBOL files in a real application.