1. A stream data generating method for a computer system for generating stream data having time information applied thereto in a time series order and processing the generated stream data on the basis of a registered query, said computer system comprising: a storage for storing query information including (1) column information indicating the columns to be analyzed as an analyzing target in the stream data, (2) range information indicating the range of data within the columns indicated in the column information to be analyzed as the analyzing target, and (3) condition information indicating a condition under which the analyzing target indicated in the range information is to be analyzed; a data generator for generating and transmitting the stream data; and a stream data processor for analysis processing the stream data transmitted from the data generator, wherein said data generator executes a step of generating a lesser quantity of stream data from the stream data transmitted to the stream data processor on the basis of the query information.