Retracted: Accelerating SQL with Complex Visual Querying

This dissertation includes the design, implementation, and evaluation of prototypes with different fidelity levels, through an iterative design process. The aim is to optimize the effectiveness and efficiency of the process where users communicate to the system regarding data they intend to extract from the database. Moreover, the readability and comprehension improvement of the query visual representation is intended, reducing the time and the effort required to understand what data will be gathered from the database. The final implemented interface is currently incorporated on the OutSystems Platform to accelerate the query formulation process without harming the leamability of the system. The users’ interviews and the results of the SQL queries evaluation have foreseen that the cause of the reduced acceptance of the visual approach, could be the existing usability problems on the interface. Furthermore, the interface is inadequate to build more complex queries, which involve more entities and conditions.