Providing temporary use of non-downloadable computer software for data mining, data query, and data analysis, for connecting to data stored in relational and multidimensional databases and other data repositories, for facilitation of the creation of key performance indicators (KPIs) from the data, for designing interactive views and visual representations of the KPIs using charts, gauges, maps, grids and other visualization types, and for publishing and integrating these designs into various web-based and other business applications, and for generating reports summarizing same