A method for television viewing data analysis is described comprising, the method including receiving a query including audience parameters defining characteristics of a subset of a viewing audience, and viewing pattern parameters defining viewing patterns to be analyzed, applying the audience parameters to a database of viewer characteristics and determining therefrom a plurality of viewers from whom data is to be collected, building a viewer query based on the viewing pattern parameters, sending the viewer query to a plurality of viewer devices associated with the plurality of viewers for execution thereat, after execution of the viewer query at the plurality of viewer devices, receiving a viewer query result from at least some of the plurality of viewer devices, and analyzing the received viewer query results to produce a result of the query. Related methods and apparatus are also described.