VIQING: visual interactive querying

The paper presents VIQING, an environment for expressing queries via direct manipulation of data visualizations. VIQING provides a simple graphical interface for connecting visualizations, and has the expressive power of the basic relational operators select, project and join. VIQING has been implemented in the Tioga DataSplash visualization system to provide a seamless integration of querying and browsing. The resulting system is unique in providing a unified visual interface for developing database applications, encompassing both querying and data visualization.