In the routine activities of research and monitoring within the Istituto Nazionale di Geofisica e Vulcanologia (INGV-OE) different actors manifest, over time and for several purposes, the need to analyse particular subsets of data contained in various databases. Often, in fact, before using sophisticated analysis tools, a mere cross-visualization of the data offers a first and concrete help in the analysis of the same. For example, new queries are constantly being designed to aggregate and provide informations relating to groups of instruments of the monitoring networks or relating to particular time series of interest or even to list services belonging to control room systems. Once created, the aggregation queries are then integrated into existing tools (web pages, client/server...